[02:46:22 WARN]: org.apache.commons.lang.UnhandledException: Plugin WildStacker v3 Pre-2 generated an exception while executing task 18537
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
at com.bgsoftware.wildstacker.objects.WStackedSpawner.getLinkedEntity(WStackedSpawner.java:282)
at com.bgsoftware.wildstacker.objects.WStackedEntity.lambda$runSpawnerStackAsync$12(WStackedEntity.java:403)
at com.bgsoftware.wildstacker.utils.threads.StackService.lambda$execute$0(StackService.java:30)
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:59)
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
... 3 more