diff --git a/src/main/java/com/songoda/skyblock/listeners/Block.java b/src/main/java/com/songoda/skyblock/listeners/Block.java
index 110a015e..04d1f5ce 100644
--- a/src/main/java/com/songoda/skyblock/listeners/Block.java
+++ b/src/main/java/com/songoda/skyblock/listeners/Block.java
@@ -342,8 +342,6 @@ public class Block implements Listener {
         }
 
         if (NMSUtil.getVersionNumber() < 12) {
-        	if (event.getToBlock().getType() != Material.COBBLESTONE)
-        		return;
             if (generatorManager != null && generatorManager.getGenerators().size() > 0 && generatorManager.isGenerator(block)) {
                 List<Generator> generators = new ArrayList<>(generatorManager.getGenerators());
                 Collections.reverse(generators); // Use the highest generator available
@@ -549,7 +547,7 @@ public class Block implements Listener {
 
         BlockState state = event.getNewState();
         Material type = state.getType();
-        if (type != Material.COBBLESTONE) return;
+        if (type != Material.COBBLESTONE && type != Material.STONE) return;
 
         GeneratorManager generatorManager = skyblock.getGeneratorManager();
         if (generatorManager == null) return;
diff --git a/src/main/java/com/songoda/skyblock/listeners/Join.java b/src/main/java/com/songoda/skyblock/listeners/Join.java
index 657b2db7..97b431b8 100644
--- a/src/main/java/com/songoda/skyblock/listeners/Join.java
+++ b/src/main/java/com/songoda/skyblock/listeners/Join.java
@@ -25,8 +25,6 @@ import org.bukkit.event.player.PlayerJoinEvent;
 
 import java.io.File;
 import java.lang.reflect.Method;
-import java.util.HashMap;
-import java.util.Map;
 
 public class Join implements Listener {
 
diff --git a/src/main/java/com/songoda/skyblock/placeholder/MVdWPlaceholder.java b/src/main/java/com/songoda/skyblock/placeholder/MVdWPlaceholder.java
index b9a36b3e..3c87bd20 100644
--- a/src/main/java/com/songoda/skyblock/placeholder/MVdWPlaceholder.java
+++ b/src/main/java/com/songoda/skyblock/placeholder/MVdWPlaceholder.java
@@ -16,6 +16,7 @@ import org.bukkit.entity.Player;
 
 import java.io.File;
 import java.util.List;
+import java.util.logging.Level;
 
 public class MVdWPlaceholder {
 
@@ -127,13 +128,19 @@ public class MVdWPlaceholder {
 
         for (String placeholderList : placeholderManager.getPlaceholders()) {
             PlaceholderAPI.registerPlaceholder(skyblock, placeholderList, event -> {
-                Player player = event.getPlayer();
-
-                if (player == null) {
-                    return null;
-                }
-
-                return placeholderManager.getPlaceholder(player, event.getPlaceholder());
+            	try {
+            		Player player = event.getPlayer();
+            		
+            		if (player == null) {
+            			return null;
+            		}
+            		
+            		return placeholderManager.getPlaceholder(player, event.getPlaceholder());
+            	} catch (Exception ex) {
+            		Bukkit.getLogger().log(Level.WARNING, "[FabledSkyBlock] Exception while retrieving placeholder {}:", event.getPlaceholder());
+            		Bukkit.getLogger().log(Level.WARNING, "", ex);
+            		return event.getPlaceholder();
+            	}
             });
         }
     }
diff --git a/src/main/java/com/songoda/skyblock/placeholder/PlaceholderManager.java b/src/main/java/com/songoda/skyblock/placeholder/PlaceholderManager.java
index 218e9d24..64157a87 100644
--- a/src/main/java/com/songoda/skyblock/placeholder/PlaceholderManager.java
+++ b/src/main/java/com/songoda/skyblock/placeholder/PlaceholderManager.java
@@ -116,7 +116,7 @@ public class PlaceholderManager {
                                 .replace("%placeholder", "" + island.getRadius()));
             }
         } else if (placeholder.equalsIgnoreCase("fabledskyblock_island_level")) {
-            return island == null ? "0": Long.toString(island.getLevel().getLevel());
+            return island == null || island.getLevel() == null ? "0": Long.toString(island.getLevel().getLevel());
         } else if (placeholder.equalsIgnoreCase("fabledskyblock_island_level_formatted")) {
             if (island == null) {
                 return ChatColor.translateAlternateColorCodes('&',