BauSystem_Main/src/de/steamwar/bausystem/features/hotbar/DefaultHotbar.java

@@ -70,7 +70,11 @@ public class DefaultHotbar {
             if (yapionAnyType instanceof YAPIONValue) {
                 hotbar[integer] = null;
             } else {
-                hotbar[integer] = (ItemStack) YAPIONDeserializer.deserialize((YAPIONObject) yapionAnyType);
+                try {
+                    hotbar[integer] = YAPIONDeserializer.deserialize((YAPIONObject) yapionAnyType);
+                } catch (Exception e) {
+                    hotbar[integer] = null;
+                }
             }
         });
         return hotbar;