pom.xml

@@ -245,6 +245,12 @@
             <version>1.0.0-20240329.173606-35</version>
             <scope>provided</scope>
         </dependency>
+        <dependency>
+            <groupId>com.craftaro</groupId>
+            <artifactId>CraftaroCore</artifactId>
+            <version>3.0.5-20240406.040431-1</version>
+            <scope>provided</scope>
+        </dependency>
     </dependencies>
 
     <build>

src/main/java/world/bentobox/level/calculators/IslandLevelCalculator.java

@@ -41,7 +41,7 @@ import com.google.common.collect.Multiset;
 import com.google.common.collect.Multiset.Entry;
 import com.google.common.collect.Multisets;
 import com.craftaro.ultimatestacker.api.UltimateStackerApi;
-import com.craftaro.ultimatestacker.api.utils.Stackable;
+import com.craftaro.ultimatestacker.api.stack.block.BlockStack;
 
 import dev.rosewood.rosestacker.api.RoseStackerAPI;
 import us.lynuxcraft.deadsilenceiv.advancedchests.AdvancedChestsAPI;
@@ -468,7 +468,7 @@ public class IslandLevelCalculator {
 
 		    if (addon.isUltimateStackerEnabled()) {
 			if (!blockData.getMaterial().equals(Material.AIR)) {
-			    Stackable stack = UltimateStackerApi.getBlockStackManager().getBlock(block.getLocation());
+			    BlockStack stack = UltimateStackerApi.getBlockStackManager().getBlock(block.getLocation());
 			    if (stack != null) {
 				int value = limitCount(blockData.getMaterial());
 				if (belowSeaLevel) {