Lots and LOTS of isOnline checks

src/main/java/net/Indyuce/mmocore/api/droptable/dropitem/DropTableDropItem.java

@@ -6,6 +6,7 @@ import net.Indyuce.mmocore.MMOCore;
 import net.Indyuce.mmocore.api.droptable.DropTable;
 import net.Indyuce.mmocore.api.droptable.condition.ConditionInstance;
 import net.Indyuce.mmocore.api.loot.LootBuilder;
+import net.Indyuce.mmocore.api.player.PlayerData;
 import net.mmogroup.mmolib.api.MMOLineConfig;
 
 public class DropTableDropItem extends DropItem {
@@ -23,7 +24,9 @@ public class DropTableDropItem extends DropItem {
 
 	@Override
 	public void collect(LootBuilder builder) {
-		if (dropTable.areConditionsMet(new ConditionInstance(builder.getEntity().getPlayer())))
+		PlayerData data = builder.getEntity();
+		if(!data.isOnline()) return;
+		if (dropTable.areConditionsMet(new ConditionInstance(data.getPlayer())))
 			for (int j = 0; j < rollAmount(); j++)
 				builder.addLoot(dropTable.collect(builder));
 	}

src/main/java/net/Indyuce/mmocore/api/event/CustomBlockMineEvent.java

@@ -29,8 +29,9 @@ public class CustomBlockMineEvent extends PlayerDataEvent implements Cancellable
 
 		this.block = block;
 		this.info = info;
-		this.drops = (info.hasDropTable() && info.getDropTable().areConditionsMet(new ConditionInstance(player.getPlayer())))
+		this.drops = (info.hasDropTable() && player.isOnline()
-			? info.collectDrops(new LootBuilder(player, 0)) : new ArrayList<>();
+				&& info.getDropTable().areConditionsMet(new ConditionInstance(player.getPlayer())))
+					? info.collectDrops(new LootBuilder(player, 0)) : new ArrayList<>();
 		this.experience = info.hasExperience() ? info.getExperience().newInfo() : null;
 	}
 

src/main/java/net/Indyuce/mmocore/api/experience/PlayerProfessions.java

@@ -127,7 +127,7 @@ public class PlayerProfessions {
 		value = MMOCore.plugin.boosterManager.calculateExp(profession, value);
 
 		// display hologram
-		if (MMOCore.plugin.getConfig().getBoolean("display-exp-holograms"))
+		if (MMOCore.plugin.getConfig().getBoolean("display-exp-holograms") && playerData.isOnline())
 			if (loc != null && MMOCore.plugin.hologramSupport != null)
 				MMOCore.plugin.hologramSupport.displayIndicator(loc.add(.5, 1.5, .5),
 						MMOCore.plugin.configManager.getSimpleMessage("exp-hologram", "exp", "" + value).message(), playerData.getPlayer());
@@ -158,7 +158,7 @@ public class PlayerProfessions {
 			playerData.giveExperience((int) profession.getExperience().calculate(level), null);
 		}
 
-		if (check) {
+		if (check && playerData.isOnline()) {
 			Bukkit.getPluginManager().callEvent(new PlayerLevelUpEvent(playerData, profession, oldLevel, level));
 			new SmallParticleEffect(playerData.getPlayer(), Particle.SPELL_INSTANT);
 			new ConfigMessage("profession-level-up").addPlaceholders("level", "" + level, "profession", profession.getName())
@@ -171,7 +171,8 @@ public class PlayerProfessions {
 		int chars = (int) ((double) exp / needed * 20);
 		for (int j = 0; j < 20; j++)
 			bar += (j == chars ? "" + ChatColor.WHITE + ChatColor.BOLD : "") + "|";
-		MMOCore.plugin.configManager.getSimpleMessage("exp-notification", "profession", profession.getName(), "progress", bar, "ratio",
+		if(playerData.isOnline())
+			MMOCore.plugin.configManager.getSimpleMessage("exp-notification", "profession", profession.getName(), "progress", bar, "ratio",
 				MMOCore.plugin.configManager.decimal.format((double) exp / needed * 100)).send(playerData.getPlayer());
 	}
 }

src/main/java/net/Indyuce/mmocore/api/experience/source/BrewPotionExperienceSource.java

@@ -58,6 +58,7 @@ public class BrewPotionExperienceSource extends ExperienceSource<PotionMeta> {
 							return;
 
 						PlayerData data = PlayerData.get(playerOpt.get());
+						if(!data.isOnline()) return;
 						for (BrewPotionExperienceSource source : getSources())
 							if (source.matches(data, (PotionMeta) brewn.getItemMeta()))
 								new PotionUpgrade(found, brewn).process(data.getPlayer());

src/main/java/net/Indyuce/mmocore/api/experience/source/type/ExperienceSource.java

@@ -48,8 +48,12 @@ public abstract class ExperienceSource<T> {
 
 	public void giveExperience(PlayerData player, int amount, Location location) {
 		if (hasProfession())
-			player.getCollectionSkills().giveExperience(profession, amount, location == null ? player.getPlayer().getLocation() : location, EXPSource.SOURCE);
+			player.getCollectionSkills().giveExperience(profession, amount, location == null ? getPlayerLocation(player) : location, EXPSource.SOURCE);
 		else
-			player.giveExperience(amount, location == null ? player.getPlayer().getLocation() : location, EXPSource.SOURCE);
+			player.giveExperience(amount, location == null ? getPlayerLocation(player) : location, EXPSource.SOURCE);
+	}
+	
+	private Location getPlayerLocation(PlayerData player) {
+		return player.isOnline() ? player.getPlayer().getLocation() : null;
 	}
 }

src/main/java/net/Indyuce/mmocore/api/loot/LootChestRegion.java

@@ -76,7 +76,7 @@ public class LootChestRegion {
 	}
 
 	public void spawnChest(PlayerData player) {
-
+		if(!player.isOnline()) return;
 		// first randomly determine the chest tier
 		ChestTier tier = rollTier();
 

src/main/java/net/Indyuce/mmocore/api/player/CombatRunnable.java

@@ -14,7 +14,8 @@ public class CombatRunnable extends BukkitRunnable {
 	public CombatRunnable(PlayerData player) {
 		this.player = player;
 
-		MMOCore.plugin.configManager.getSimpleMessage("now-in-combat").send(player.getPlayer());
+		if(player.isOnline())
+			MMOCore.plugin.configManager.getSimpleMessage("now-in-combat").send(player.getPlayer());
 		Bukkit.getPluginManager().callEvent(new PlayerCombatEvent(player, true));
 		runTaskTimer(MMOCore.plugin, 20, 20);
 	}

src/main/java/net/Indyuce/mmocore/api/player/PlayerData.java

@@ -254,6 +254,7 @@ public class PlayerData extends OfflinePlayerData {
 
 	public void refreshVanillaExp() {
 		if (MMOCore.plugin.configManager.overrideVanillaExp) {
+			if(!isOnline()) return;
 			getPlayer().setLevel(getLevel());
 			getPlayer().setExp(Math.max(0, Math.min(1, (float) experience / (float) getLevelUpExperience())));
 		}
@@ -333,6 +334,7 @@ public class PlayerData extends OfflinePlayerData {
 	}
 
 	public void heal(double heal) {
+		if(!isOnline()) return;
 		double newest = Math.max(0, Math.min(getPlayer().getHealth() + heal, getPlayer().getAttribute(Attribute.GENERIC_MAX_HEALTH).getValue()));
 		if (getPlayer().getHealth() == newest)
 			return;
@@ -368,7 +370,7 @@ public class PlayerData extends OfflinePlayerData {
 	}
 
 	public void log(Level level, String message) {
-		MMOCore.plugin.getLogger().log(level, "[Userdata:" + getPlayer().getName() + "] " + message);
+		MMOCore.plugin.getLogger().log(level, "[Userdata:" + (isOnline() ? getPlayer().getName() : "Offline Player") + "] " + message);
 	}
 
 	public void setLastFriendRequest(long ms) {
@@ -376,6 +378,7 @@ public class PlayerData extends OfflinePlayerData {
 	}
 
 	public void sendFriendRequest(PlayerData target) {
+		if(!isOnline() || !target.isOnline()) return;
 		setLastFriendRequest(System.currentTimeMillis());
 
 		FriendRequest request = new FriendRequest(this, target);
@@ -395,10 +398,12 @@ public class PlayerData extends OfflinePlayerData {
 
 		giveStellium(-waypoint.getStelliumCost());
 
+		if(!isOnline()) return;
 		new BukkitRunnable() {
 			int x = getPlayer().getLocation().getBlockX(), y = getPlayer().getLocation().getBlockY(), z = getPlayer().getLocation().getBlockZ(), t;
 
 			public void run() {
+				if(!isOnline()) return;
 				if (getPlayer().getLocation().getBlockX() != x || getPlayer().getLocation().getBlockY() != y
 						|| getPlayer().getLocation().getBlockZ() != z) {
 					getPlayer().playSound(getPlayer().getLocation(), Sound.ENTITY_VILLAGER_NO, 1, .5f);
@@ -442,7 +447,7 @@ public class PlayerData extends OfflinePlayerData {
 		}
 
 		// display hologram
-		if (MMOCore.plugin.getConfig().getBoolean("display-exp-holograms"))
+		if (MMOCore.plugin.getConfig().getBoolean("display-exp-holograms") && isOnline())
 			if (loc != null && MMOCore.plugin.hologramSupport != null)
 				MMOCore.plugin.hologramSupport.displayIndicator(loc.add(.5, 1.5, .5),
 						MMOCore.plugin.configManager.getSimpleMessage("exp-hologram", "exp", "" + value).message(), getPlayer());
@@ -471,9 +476,11 @@ public class PlayerData extends OfflinePlayerData {
 
 		if (level > oldLevel) {
 			Bukkit.getPluginManager().callEvent(new PlayerLevelUpEvent(this, null, oldLevel, level));
-			new ConfigMessage("level-up").addPlaceholders("level", "" + level).send(getPlayer());
+			if(isOnline()) {
-			getPlayer().playSound(getPlayer().getLocation(), Sound.ENTITY_PLAYER_LEVELUP, 1, 1);
+				new ConfigMessage("level-up").addPlaceholders("level", "" + level).send(getPlayer());
-			new SmallParticleEffect(getPlayer(), Particle.SPELL_INSTANT);
+				getPlayer().playSound(getPlayer().getLocation(), Sound.ENTITY_PLAYER_LEVELUP, 1, 1);
+				new SmallParticleEffect(getPlayer(), Particle.SPELL_INSTANT);
+			}
 			getStats().updateStats();
 		}
 
@@ -577,6 +584,7 @@ public class PlayerData extends OfflinePlayerData {
 	}
 
 	public void displayActionBar(String message) {
+		if(!isOnline()) return;
 		setActionBarTimeOut(MMOCore.plugin.actionBarManager.getTimeOut());
 		getPlayer().spigot().sendMessage(ChatMessageType.ACTION_BAR, TextComponent.fromLegacyText(message));
 	}
@@ -728,7 +736,7 @@ public class PlayerData extends OfflinePlayerData {
 		 */
 		SkillResult cast = skill.getSkill().whenCast(this, skill);
 		if (!cast.isSuccessful()) {
-			if (!skill.getSkill().isPassive()) {
+			if (!skill.getSkill().isPassive() && isOnline()) {				
 				if (cast.getCancelReason() == CancelReason.LOCKED)
 					MMOCore.plugin.configManager.getSimpleMessage("not-unlocked-skill").send(getPlayer());
 

src/main/java/net/Indyuce/mmocore/api/player/social/FriendRequest.java

@@ -20,6 +20,7 @@ public class FriendRequest extends Request {
 
 	public void deny() {
 		MMOCore.plugin.requestManager.unregisterRequest(getUniqueId());
+		if(!target.isOnline()) return;
 		target.getPlayer().playSound(target.getPlayer().getLocation(), Sound.ENTITY_VILLAGER_NO, 1, 1);
 	}
 
@@ -27,8 +28,10 @@ public class FriendRequest extends Request {
 		getCreator().setLastFriendRequest(0);
 		getCreator().addFriend(target.getUniqueId());
 		target.addFriend(getCreator().getUniqueId());
-		MMOCore.plugin.configManager.getSimpleMessage("now-friends", "player", target.getPlayer().getName()).send(getCreator().getPlayer());
+		if(target.isOnline() && getCreator().isOnline()) {
-		MMOCore.plugin.configManager.getSimpleMessage("now-friends", "player", getCreator().getPlayer().getName()).send(target.getPlayer());
+			MMOCore.plugin.configManager.getSimpleMessage("now-friends", "player", target.getPlayer().getName()).send(getCreator().getPlayer());
+			MMOCore.plugin.configManager.getSimpleMessage("now-friends", "player", getCreator().getPlayer().getName()).send(target.getPlayer());
+		}
 		MMOCore.plugin.requestManager.unregisterRequest(getUniqueId());
 	}
 }

src/main/java/net/Indyuce/mmocore/api/player/social/Party.java

@@ -76,7 +76,7 @@ public class Party {
 		// transfer ownership
 		if (owner.equals(data)) {
 			owner = members.get(0);
-			if(notify) MMOCore.plugin.configManager.getSimpleMessage("transfer-party-ownership").send(owner.getPlayer());
+			if(notify && owner.isOnline()) MMOCore.plugin.configManager.getSimpleMessage("transfer-party-ownership").send(owner.getPlayer());
 		}
 	}
 
@@ -100,8 +100,9 @@ public class Party {
 	public void sendPartyInvite(PlayerData inviter, PlayerData target) {
 		invites.put(target.getUniqueId(), System.currentTimeMillis());
 		Request request = new PartyInvite(this, inviter, target);
-		new ConfigMessage("party-invite").addPlaceholders("player", inviter.getPlayer().getName(), "uuid", request.getUniqueId().toString())
+		if(inviter.isOnline() && target.isOnline())
-				.sendAsJSon(target.getPlayer());
+			new ConfigMessage("party-invite").addPlaceholders("player", inviter.getPlayer().getName(), "uuid", request.getUniqueId().toString())
+					.sendAsJSon(target.getPlayer());
 		MMOCore.plugin.requestManager.registerRequest(request);
 	}
 

src/main/java/net/Indyuce/mmocore/api/player/social/PartyInvite.java

@@ -28,9 +28,14 @@ public class PartyInvite extends Request {
 	}
 
 	public void accept() {
-		party.removeLastInvite(getCreator().getPlayer());
+		if(getCreator().isOnline())
-		party.getMembers().forEach(member -> MMOCore.plugin.configManager.getSimpleMessage("party-joined-other", "player", target.getPlayer().getName()).send(member.getPlayer()));
+			party.removeLastInvite(getCreator().getPlayer());
-		MMOCore.plugin.configManager.getSimpleMessage("party-joined", "owner", party.getOwner().getPlayer().getName()).send(target.getPlayer());
+		party.getMembers().forEach(member -> {
+			if(member.isOnline() && target.isOnline())
+				MMOCore.plugin.configManager.getSimpleMessage("party-joined-other", "player", target.getPlayer().getName()).send(member.getPlayer());
+			});
+		if(party.getOwner().isOnline() && target.isOnline())
+			MMOCore.plugin.configManager.getSimpleMessage("party-joined", "owner", party.getOwner().getPlayer().getName()).send(target.getPlayer());
 		party.addMember(target);
 		InventoryManager.PARTY_VIEW.newInventory(target).open();
 		MMOCore.plugin.requestManager.unregisterRequest(getUniqueId());

src/main/java/net/Indyuce/mmocore/api/quest/PlayerQuests.java

@@ -33,7 +33,8 @@ public class PlayerQuests {
 		this.playerData = playerData;
 		
 		bossbar = MMOLib.plugin.getVersion().getWrapper().createBossBar(new NamespacedKey(MMOCore.plugin, "quest_bar_" + playerData.getUniqueId().toString()), "", BarColor.PURPLE, BarStyle.SEGMENTED_20, new BarFlag[0]);
-		bossbar.addPlayer(playerData.getPlayer());
+		if(playerData.isOnline())
+			bossbar.addPlayer(playerData.getPlayer());
 	}
 
 	@Deprecated

src/main/java/net/Indyuce/mmocore/api/quest/objective/ClickonObjective.java

@@ -47,7 +47,7 @@ public class ClickonObjective extends Objective {
 				return;
 
 			Player player = event.getPlayer();
-			if (player.equals(getPlayer().getPlayer()))
+			if (getPlayer().isOnline() && player.equals(getPlayer().getPlayer()))
 				if (player.getWorld().equals(loc.getWorld()) && event.getClickedBlock().getLocation().distanceSquared(loc) < rangeSquared)
 					getQuestProgress().completeObjective();
 		}

src/main/java/net/Indyuce/mmocore/api/quest/objective/GoToObjective.java

@@ -46,7 +46,7 @@ public class GoToObjective extends Objective {
 				return;
 
 			Player player = event.getPlayer();
-			if (player.equals(getPlayer().getPlayer()))
+			if (getPlayer().isOnline() && player.equals(getPlayer().getPlayer()))
 				if (player.getWorld().equals(loc.getWorld()) && player.getLocation().distanceSquared(loc) < rangeSquared)
 					getQuestProgress().completeObjective();
 		}

src/main/java/net/Indyuce/mmocore/api/quest/objective/KillMobObjective.java

@@ -37,6 +37,7 @@ public class KillMobObjective extends Objective {
 
 		@EventHandler
 		public void a(EntityKillEntityEvent event) {
+			if(!getPlayer().isOnline()) return;
 			if (event.getTarget().getType() == type && event.getEntity().equals(getPlayer().getPlayer())) {
 				count++;
 				getQuestProgress().getPlayer().getQuestData().updateBossBar();

src/main/java/net/Indyuce/mmocore/api/quest/objective/MineBlockObjective.java

@@ -41,6 +41,7 @@ public class MineBlockObjective extends Objective {
 
 		@EventHandler(priority = EventPriority.HIGH, ignoreCancelled = true)
 		public void a(BlockBreakEvent event) {
+			if(!getQuestProgress().getPlayer().isOnline()) return;
 			if ((!playerPlaced) && event.getBlock().hasMetadata("player_placed"))
 				return;
 			if (event.getPlayer().equals(getQuestProgress().getPlayer().getPlayer()) && event.getBlock().getType() == block) {
@@ -53,6 +54,7 @@ public class MineBlockObjective extends Objective {
 
 		@EventHandler(priority = EventPriority.HIGH, ignoreCancelled = true)
 		public void b(CustomBlockMineEvent event) {
+			if(!getQuestProgress().getPlayer().isOnline()) return;
 			if (event.getPlayer().equals(getQuestProgress().getPlayer().getPlayer()) && event.getBlock().getType() == block) {
 				count++;
 				getQuestProgress().getPlayer().getQuestData().updateBossBar();

src/main/java/net/Indyuce/mmocore/api/quest/trigger/CommandTrigger.java

@@ -19,6 +19,7 @@ public class CommandTrigger extends Trigger {
 
 	@Override
 	public void apply(PlayerData player) {
+		if(!player.isOnline()) return;
 		Bukkit.dispatchCommand(Bukkit.getConsoleSender(), format(player.getPlayer()));
 	}
 

src/main/java/net/Indyuce/mmocore/api/quest/trigger/ItemTrigger.java

@@ -22,6 +22,7 @@ public class ItemTrigger extends Trigger {
 
 	@Override
 	public void apply(PlayerData player) {
+		if(!player.isOnline()) return;
 		new SmartGive(player.getPlayer()).give(new ItemStack(material, amount));
 	}
 }

src/main/java/net/Indyuce/mmocore/api/quest/trigger/MessageTrigger.java

@@ -18,6 +18,7 @@ public class MessageTrigger extends Trigger {
 
 	@Override
 	public void apply(PlayerData player) {
+		if(!player.isOnline()) return;
 		player.getPlayer().sendMessage(format(player.getPlayer()));
 	}
 

src/main/java/net/Indyuce/mmocore/api/quest/trigger/SoundTrigger.java

@@ -21,6 +21,7 @@ public class SoundTrigger extends Trigger {
 
 	@Override
 	public void apply(PlayerData player) {
+		if(!player.isOnline()) return;
 		player.getPlayer().playSound(player.getPlayer().getLocation(), sound, vol, pitch);
 	}
 }

src/main/java/net/Indyuce/mmocore/api/util/MMOCoreUtils.java

@@ -150,6 +150,7 @@ public class MMOCoreUtils {
 
 	// TODO worldguard flags support for no target
 	public static boolean canTarget(PlayerData player, Entity target) {
+		if(!player.isOnline()) return false;
 
 		// basic checks
 		if (!(target instanceof LivingEntity) || player.getPlayer().equals(target) || target.isDead() || MMOLib.plugin.getEntities().findCustom(target))

src/main/java/net/Indyuce/mmocore/comp/citizens/TalktoCitizenObjective.java

@@ -32,6 +32,7 @@ public class TalktoCitizenObjective extends Objective {
 
 		@EventHandler
 		public void a(CitizenInteractEvent event) {
+			if(!getQuestProgress().getPlayer().isOnline()) return;
 			if (event.getPlayer().equals(getQuestProgress().getPlayer().getPlayer()) && event.getNPC().getId() == id)
 				getQuestProgress().completeObjective();
 		}

src/main/java/net/Indyuce/mmocore/comp/mythicmobs/MythicMobSkill.java

@@ -62,7 +62,7 @@ public class MythicMobSkill extends Skill {
 	@Override
 	public SkillResult whenCast(PlayerData data, SkillInfo skill) {
 		SkillResult cast = new SkillResult(data, skill);
-		if (!cast.isSuccessful())
+		if (!cast.isSuccessful() || !data.isOnline())
 			return cast;
 
 		List<Entity> targets = new ArrayList<>();

src/main/java/net/Indyuce/mmocore/comp/mythicmobs/load/KillMythicFactionObjective.java

@@ -38,6 +38,7 @@ public class KillMythicFactionObjective extends Objective {
 
 		@EventHandler
 		public void a(MythicMobDeathEvent event) {
+			if(!getQuestProgress().getPlayer().isOnline()) return;
 			if (event.getKiller() instanceof Player
 					&& event.getKiller().equals(getQuestProgress().getPlayer().getPlayer())
 					&& event.getMob().hasFaction() && event.getMob().getFaction().equals(factionName)) {

src/main/java/net/Indyuce/mmocore/comp/mythicmobs/load/KillMythicMobObjective.java

@@ -38,6 +38,7 @@ public class KillMythicMobObjective extends Objective {
 
 		@EventHandler
 		public void a(MythicMobDeathEvent event) {
+			if(!getQuestProgress().getPlayer().isOnline()) return;
 			if (event.getKiller() instanceof Player && event.getKiller().equals(getQuestProgress().getPlayer().getPlayer()) && event.getMob().getType().getInternalName().equals(internalName)) {
 				count++;
 				getQuestProgress().getPlayer().getQuestData().updateBossBar();

src/main/java/net/Indyuce/mmocore/comp/mythicmobs/load/MythicMobSkillTrigger.java

@@ -28,6 +28,7 @@ public class MythicMobSkillTrigger extends Trigger {
 
 	@Override
 	public void apply(PlayerData player) {
+		if(!player.isOnline()) return;
 		List<Entity> targets = new ArrayList<>();
 		targets.add(player.getPlayer());
 		MythicMobs.inst().getAPIHelper().castSkill(player.getPlayer(), this.skill.getInternalName(), player.getPlayer(), player.getPlayer().getEyeLocation(), targets, null, 1);

src/main/java/net/Indyuce/mmocore/comp/vault/MoneyTrigger.java

@@ -26,7 +26,7 @@ public class MoneyTrigger extends Trigger {
 		 * instanced when the plugin loads and the economy has not been loaded
 		 * yet.
 		 */
-		if (!MMOCore.plugin.economy.isValid())
+		if (!MMOCore.plugin.economy.isValid() || !player.isOnline())
 			return;
 
 		if (operation == Operation.GIVE)

src/main/java/net/Indyuce/mmocore/gui/PlayerStats.java

@@ -294,7 +294,8 @@ public class PlayerStats extends EditableInventory {
 			holders.register("attribute_points", "" + data.getAttributePoints());
 			holders.register("progress", bar);
 			holders.register("next_level", "" + nextLevelExp);
-			holders.register("player", "" + data.getPlayer().getName());
+			if(data.isOnline())
+				holders.register("player", "" + data.getPlayer().getName());
 			holders.register("class", "" + data.getProfess().getName());
 
 			return holders;

src/main/java/net/Indyuce/mmocore/gui/social/friend/EditableFriendList.java

@@ -109,7 +109,8 @@ public class EditableFriendList extends EditableInventory {
 			PlayerData data = PlayerData.get(friend);
 
 			Placeholders holders = new Placeholders();
-			holders.register("name", data.getPlayer().getName());
+			if(data.isOnline())
+				holders.register("name", data.getPlayer().getName());
 			holders.register("class", data.getProfess().getName());
 			holders.register("level", data.getLevel());
 			holders.register("online_since", new DelayFormat(2).format(System.currentTimeMillis() - data.getLastLogin()));

src/main/java/net/Indyuce/mmocore/gui/social/guild/EditableGuildAdmin.java

@@ -48,7 +48,9 @@ public class EditableGuildAdmin extends EditableInventory {
 			PlayerData member = PlayerData.get(inv.getPlayerData().getGuild().getMembers().get(n));
 
 			Placeholders holders = new Placeholders();
-			holders.register("name", member.getPlayer().getName());
+
+			if(member.isOnline())
+				holders.register("name", member.getPlayer().getName());
 			holders.register("class", member.getProfess().getName());
 			holders.register("level", "" + member.getLevel());
 			holders.register("since", new DelayFormat(2).format(System.currentTimeMillis() - member.getLastLogin()));
@@ -64,6 +66,7 @@ public class EditableGuildAdmin extends EditableInventory {
 
 			if (meta instanceof SkullMeta)
 				Bukkit.getScheduler().runTaskAsynchronously(MMOCore.plugin, () -> {
+					if(!member.isOnline()) return;
 					((SkullMeta) meta).setOwningPlayer(member.getPlayer());
 					disp.setItemMeta(meta);
 				});

src/main/java/net/Indyuce/mmocore/gui/social/party/EditablePartyView.java

@@ -48,7 +48,8 @@ public class EditablePartyView extends EditableInventory {
 			PlayerData member = inv.getPlayerData().getParty().getMembers().get(n);
 
 			Placeholders holders = new Placeholders();
-			holders.register("name", member.getPlayer().getName());
+			if(member.isOnline())
+				holders.register("name", member.getPlayer().getName());
 			holders.register("class", member.getProfess().getName());
 			holders.register("level", "" + member.getLevel());
 			holders.register("since", new DelayFormat(2).format(System.currentTimeMillis() - member.getLastLogin()));
@@ -67,6 +68,7 @@ public class EditablePartyView extends EditableInventory {
 			 */
 			if (meta instanceof SkullMeta)
 				Bukkit.getScheduler().runTaskAsynchronously(MMOCore.plugin, () -> {
+					if(!member.isOnline()) return;
 					((SkullMeta) meta).setOwningPlayer(member.getPlayer());
 					disp.setItemMeta(meta);
 				});

src/main/java/net/Indyuce/mmocore/listener/SpellCast.java

@@ -66,6 +66,7 @@ public class SpellCast implements Listener {
 		@EventHandler(ignoreCancelled = false)
 		public void onSkillCast(PlayerItemHeldEvent event) {
 			Player player = event.getPlayer();
+			if(!playerData.isOnline()) return;
 			if (!event.getPlayer().equals(playerData.getPlayer()))
 				return;
 
@@ -92,6 +93,7 @@ public class SpellCast implements Listener {
 		@EventHandler
 		public void stopCasting(PlayerSwapHandItemsEvent event) {
 			Player player = event.getPlayer();
+			if(!playerData.isOnline()) return;
 			if (event.getPlayer().equals(playerData.getPlayer()) && !player.isSneaking()) {
 				player.playSound(player.getLocation(), Sound.BLOCK_FIRE_EXTINGUISH, 1, 2);
 				MMOCore.plugin.configManager.getSimpleMessage("casting.no-longer").send(playerData.getPlayer());
@@ -107,6 +109,7 @@ public class SpellCast implements Listener {
 
 		private String getFormat(PlayerData data) {
 			String str = "";
+			if(!data.isOnline()) return str;
 			for (int j = 0; j < data.getBoundSkills().size(); j++) {
 				SkillInfo skill = data.getBoundSkill(j);
 				str += (str.isEmpty() ? "" : split)

src/main/java/net/Indyuce/mmocore/listener/option/DeathExperienceLoss.java

@@ -17,6 +17,7 @@ public class DeathExperienceLoss implements Listener {
 		PlayerData data = PlayerData.get(event.getEntity());
 		int loss = (int) (data.getExperience() * this.loss);
 		data.setExperience(data.getExperience() - loss);
-		new ConfigMessage("death-exp-loss").addPlaceholders("loss", "" + loss).send(data.getPlayer());
+		if(data.isOnline())
+			new ConfigMessage("death-exp-loss").addPlaceholders("loss", "" + loss).send(data.getPlayer());
 	}
 }

src/main/java/net/Indyuce/mmocore/skill/Ambers.java

@@ -70,6 +70,7 @@ public class Ambers extends Skill implements Listener {
 
 		@Override
 		public void run() {
+			if(!data.isOnline()) return;
 			if (j++ > 66 || !data.getPlayer().getWorld().equals(loc.getWorld())) {
 				cancel();
 				return;

src/main/java/net/Indyuce/mmocore/skill/Combo_Attack.java

@@ -43,6 +43,7 @@ public class Combo_Attack extends Skill {
 
 			@Override
 			public void run() {
+				if(!data.isOnline()) return;
 				if (c++ > count) {
 					cancel();
 					return;

src/main/java/net/Indyuce/mmocore/skill/Control.java

@@ -40,7 +40,8 @@ public class Control extends Skill {
 		if (!cast.isSuccessful())
 			return cast;
 
-		data.getPlayer().getWorld().playSound(data.getPlayer().getLocation(), Sound.BLOCK_END_PORTAL_FRAME_FILL, 1, 1);
+		if(data.isOnline())
+			data.getPlayer().getWorld().playSound(data.getPlayer().getLocation(), Sound.BLOCK_END_PORTAL_FRAME_FILL, 1, 1);
 		cast.getTarget().addPotionEffect(new PotionEffect(PotionEffectType.SLOW, 20 * 2, 0));
 		new TelekinesyRunnable(data, cast.getTarget(), cast.getModifier("knockback") / 100, cast.getModifier("duration"));
 		return cast;
@@ -67,6 +68,7 @@ public class Control extends Skill {
 
 		@EventHandler
 		public void a(PlayerInteractEvent event) {
+			if(!data.isOnline()) return;
 			if (event.getPlayer().equals(data.getPlayer()) && event.getAction().name().contains("LEFT_CLICK")) {
 				Vector vec = data.getPlayer().getEyeLocation().getDirection().multiply(3 * f);
 				vec.setY(Math.max(.5, vec.getY() / 2));

src/main/java/net/Indyuce/mmocore/skill/Deep_Wound.java

@@ -31,7 +31,7 @@ public class Deep_Wound extends Skill {
 	@Override
 	public SkillResult whenCast(PlayerData data, SkillInfo skill) {
 		TargetSkillResult cast = new TargetSkillResult(data, skill, 3);
-		if (!cast.isSuccessful())
+		if (!cast.isSuccessful() || !data.isOnline())
 			return cast;
 
 		LivingEntity target = cast.getTarget();

src/main/java/net/Indyuce/mmocore/skill/Empowered_Attack.java

@@ -45,7 +45,8 @@ public class Empowered_Attack extends Skill {
 		if (!cast.isSuccessful())
 			return cast;
 
-		data.getPlayer().playSound(data.getPlayer().getLocation(), Sound.BLOCK_END_PORTAL_FRAME_FILL, 1, 1);
+		if(data.isOnline())
+			data.getPlayer().playSound(data.getPlayer().getLocation(), Sound.BLOCK_END_PORTAL_FRAME_FILL, 1, 1);
 		new EmpoweredAttack(data, cast.getModifier("extra"), cast.getModifier("ratio"), cast.getModifier("radius"));
 		return cast;
 	}
@@ -69,7 +70,8 @@ public class Empowered_Attack extends Skill {
 			this.r = ratio / 100;
 			this.rad = radius;
 
-			new SmallParticleEffect(player.getPlayer(), Particle.FIREWORKS_SPARK);
+			if(player.isOnline())
+				new SmallParticleEffect(player.getPlayer(), Particle.FIREWORKS_SPARK);
 
 			Bukkit.getPluginManager().registerEvents(this, MMOCore.plugin);
 			Bukkit.getScheduler().scheduleSyncDelayedTask(MMOCore.plugin, () -> close(), 80);
@@ -81,6 +83,7 @@ public class Empowered_Attack extends Skill {
 
 		@EventHandler
 		public void a(PlayerAttackEvent event) {
+			if(!player.isOnline()) return;
 			if (event.getPlayer().equals(player.getPlayer()) && event.getAttack().hasType(DamageType.WEAPON)) {
 				close();
 

src/main/java/net/Indyuce/mmocore/skill/Evade.java

@@ -36,9 +36,10 @@ public class Evade extends Skill {
 		SkillResult cast = new SkillResult(data, skill);
 		if (!cast.isSuccessful())
 			return cast;
-
+		if(data.isOnline()) {
-		data.getPlayer().getWorld().playSound(data.getPlayer().getLocation(), VersionSound.ENTITY_ENDERMAN_TELEPORT.toSound(), 1, 2);
+			data.getPlayer().getWorld().playSound(data.getPlayer().getLocation(), VersionSound.ENTITY_ENDERMAN_TELEPORT.toSound(), 1, 2);
-		new SmallParticleEffect(data.getPlayer(), Particle.CLOUD);
+			new SmallParticleEffect(data.getPlayer(), Particle.CLOUD);
+		}
 		new EvadeSkill(data, cast.getModifier("duration"));
 		return cast;
 	}
@@ -61,6 +62,7 @@ public class Evade extends Skill {
 
 		@EventHandler(priority = EventPriority.LOW)
 		public void a(EntityDamageEvent event) {
+			if(!data.isOnline()) return;
 			if (event.getEntity().equals(data.getPlayer()))
 				event.setCancelled(true);
 		}

src/main/java/net/Indyuce/mmocore/skill/Fire_Rage.java

@@ -76,12 +76,15 @@ public class Fire_Rage extends Skill {
 			Bukkit.getScheduler().runTaskLater(MMOCore.plugin, () -> close(), (long) (cast.getModifier("duration") * 20));
 			runTaskTimer(MMOCore.plugin, 0, 1);
 
-			data.getPlayer().removePotionEffect(PotionEffectType.SLOW);
+			if(data.isOnline()) {
-			data.getPlayer().addPotionEffect(new PotionEffect(PotionEffectType.SLOW, (int) (cast.getModifier("duration") * 20), 1));
+				data.getPlayer().removePotionEffect(PotionEffectType.SLOW);
+				data.getPlayer().addPotionEffect(new PotionEffect(PotionEffectType.SLOW, (int) (cast.getModifier("duration") * 20), 1));
+			}
 		}
 
 		@EventHandler
 		public void a(PlayerInteractEvent event) {
+			if(!data.isOnline()) return;
 			if (event.getPlayer().equals(data.getPlayer()) && event.getAction().name().contains("LEFT_CLICK") && (System.currentTimeMillis() - last) > timeOut) {
 				last = System.currentTimeMillis();
 				castEffect();
@@ -92,6 +95,7 @@ public class Fire_Rage extends Skill {
 		}
 
 		private void castEffect() {
+			if(!data.isOnline()) return;
 			VectorRotation rotation = new VectorRotation(data.getPlayer().getEyeLocation());
 			for (double a = 0; a < Math.PI * 2; a += Math.PI / 13) {
 				Vector vec = rotation.rotate(new Vector(Math.cos(a), Math.sin(a), 0)).add(data.getPlayer().getEyeLocation().getDirection().multiply(.5)).multiply(.3);
@@ -108,6 +112,7 @@ public class Fire_Rage extends Skill {
 		}
 
 		private void fireball(boolean last) {
+			if(!data.isOnline()) return;
 			if (last) {
 				data.getPlayer().removePotionEffect(PotionEffectType.SLOW);
 				data.getPlayer().removePotionEffect(PotionEffectType.SLOW);

src/main/java/net/Indyuce/mmocore/skill/Fire_Storm.java

@@ -35,7 +35,7 @@ public class Fire_Storm extends Skill {
 	@Override
 	public SkillResult whenCast(PlayerData data, SkillInfo skill) {
 		TargetSkillResult cast = new TargetSkillResult(data, skill, 20);
-		if (!cast.isSuccessful())
+		if (!cast.isSuccessful() || !data.isOnline())
 			return cast;
 
 		LivingEntity target = cast.getTarget();

src/main/java/net/Indyuce/mmocore/skill/Fireball.java

@@ -37,7 +37,7 @@ public class Fireball extends Skill {
 	@Override
 	public SkillResult whenCast(PlayerData data, SkillInfo skill) {
 		SkillResult cast = new SkillResult(data, skill);
-		if (!cast.isSuccessful())
+		if (!cast.isSuccessful() || !data.isOnline())
 			return cast;
 
 		data.getPlayer().getWorld().playSound(data.getPlayer().getLocation(), VersionSound.ENTITY_FIREWORK_ROCKET_BLAST.toSound(), 1, 1);

src/main/java/net/Indyuce/mmocore/skill/Furtive_Strike.java

@@ -31,7 +31,7 @@ public class Furtive_Strike extends Skill {
 	@Override
 	public SkillResult whenCast(PlayerData data, SkillInfo skill) {
 		TargetSkillResult cast = new TargetSkillResult(data, skill, 3);
-		if (!cast.isSuccessful())
+		if (!cast.isSuccessful() || !data.isOnline())
 			return cast;
 
 		LivingEntity target = cast.getTarget();

src/main/java/net/Indyuce/mmocore/skill/Ice_Spikes.java

@@ -40,7 +40,7 @@ public class Ice_Spikes extends Skill {
 	@Override
 	public SkillResult whenCast(PlayerData data, SkillInfo skill) {
 		LocationSkillResult cast = new LocationSkillResult(data, skill, 20);
-		if (!cast.isSuccessful())
+		if (!cast.isSuccessful() || !data.isOnline())
 			return cast;
 
 		Location loc = cast.getHit();

src/main/java/net/Indyuce/mmocore/skill/Power_Mark.java

@@ -99,7 +99,7 @@ public class Power_Mark extends Skill implements Listener {
 
 		@Override
 		public void run() {
-
+			if(!data.isOnline()) return;
 			if (j++ > duration * 20) {
 				unregister();
 

src/main/java/net/Indyuce/mmocore/skill/Telekinesy.java

@@ -36,7 +36,7 @@ public class Telekinesy extends Skill {
 	@Override
 	public SkillResult whenCast(PlayerData data, SkillInfo skill) {
 		TargetSkillResult cast = new TargetSkillResult(data, skill, 7);
-		if (!cast.isSuccessful())
+		if (!cast.isSuccessful() || !data.isOnline())
 			return cast;
 
 		data.getPlayer().getWorld().playSound(data.getPlayer().getLocation(), Sound.BLOCK_END_PORTAL_FRAME_FILL, 1, 1);
@@ -67,6 +67,7 @@ public class Telekinesy extends Skill {
 
 		@EventHandler
 		public void a(PlayerInteractEvent event) {
+			if(!data.isOnline()) return;
 			if (event.getPlayer().equals(data.getPlayer()) && event.getAction().name().contains("LEFT_CLICK")) {
 				entity.setVelocity(data.getPlayer().getEyeLocation().getDirection().multiply(1.5 * f));
 				entity.getWorld().playSound(entity.getLocation(), VersionSound.ENTITY_FIREWORK_ROCKET_BLAST.toSound(), 2, 1);

src/main/java/net/Indyuce/mmocore/skill/Warp.java

@@ -27,7 +27,7 @@ public class Warp extends Skill {
 	@Override
 	public SkillResult whenCast(PlayerData data, SkillInfo skill) {
 		WarpCast cast = new WarpCast(data, skill);
-		if (!cast.isSuccessful())
+		if (!cast.isSuccessful() || !data.isOnline())
 			return cast;
 
 		data.getPlayer().getWorld().playSound(data.getPlayer().getLocation(), Sound.BLOCK_END_PORTAL_FRAME_FILL, 1, 2);
@@ -52,7 +52,8 @@ public class Warp extends Skill {
 
 		public WarpCast(PlayerData data, SkillInfo skill) {
 			super(data, skill);
-			if (isSuccessful() && (block = data.getPlayer().getTargetBlock(null, (int) getModifier("range"))) == null)
+			if(!data.isOnline()) abort();
+			else if (isSuccessful() && (block = data.getPlayer().getTargetBlock(null, (int) getModifier("range"))) == null)
 				abort();
 		}
 	}

src/main/java/net/Indyuce/mmocore/skill/Weaken.java

@@ -35,7 +35,7 @@ public class Weaken extends Skill {
 	@Override
 	public SkillResult whenCast(PlayerData data, SkillInfo skill) {
 		TargetSkillResult cast = new TargetSkillResult(data, skill, 7);
-		if (!cast.isSuccessful())
+		if (!cast.isSuccessful() || !data.isOnline())
 			return cast;
 
 		LivingEntity target = cast.getTarget();