An error occurred while apply entity stack condition

[Dweezy750]

As the console told me :)

20.04 10:36:01 [Server] ERROR [RoseStacker] An error occurred while apply entity stack condition: {key=dont-stack-if-different-age, class=org.bukkit.entity.Ageable}. Entity classes: [org.bukkit.craftbukkit.entity.CraftWitch, org.bukkit.craftbukkit.entity.CraftWitch]. This condition will always fail. Please report this to the plugin author. A stacktrace will be printed below.
20.04 10:36:01 [Server] WARN java.lang.RuntimeException: Stack condition apply error

20.04 10:36:01 [Server] WARN at RoseStacker-1.5.32.jar//dev.rosewood.rosestacker.stack.settings.EntityStackSettings$StackConditionEntry.printWarning(EntityStackSettings.java:407)
20.04 10:36:01 [Server] WARN at RoseStacker-1.5.32.jar//dev.rosewood.rosestacker.stack.settings.EntityStackSettings$StackConditionEntry.apply(EntityStackSettings.java:388)
20.04 10:36:01 [Server] WARN at RoseStacker-1.5.32.jar//dev.rosewood.rosestacker.stack.settings.EntityStackSettings.canStackWith(EntityStackSettings.java:211)
20.04 10:36:01 [Server] WARN at RoseStacker-1.5.32.jar//dev.rosewood.rosestacker.stack.settings.EntityStackSettings.testCanStackWith(EntityStackSettings.java:194)
20.04 10:36:01 [Server] WARN at RoseStacker-1.5.32.jar//dev.rosewood.rosestacker.spawning.MobSpawningMethod.lambda$spawnEntitiesIntoNearbyStacks$6(MobSpawningMethod.java:280)
20.04 10:36:01 [Server] WARN at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:178)
20.04 10:36:01 [Server] WARN at java.base/java.util.ArrayList$ArrayListSpliterator.tryAdvance(ArrayList.java:1685)
20.04 10:36:01 [Server] WARN at java.base/java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:129)
20.04 10:36:01 [Server] WARN at java.base/java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:527)
20.04 10:36:01 [Server] WARN at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:513)
20.04 10:36:01 [Server] WARN at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
20.04 10:36:01 [Server] WARN at java.base/java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:150)
20.04 10:36:01 [Server] WARN at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
20.04 10:36:01 [Server] WARN at java.base/java.util.stream.ReferencePipeline.findAny(ReferencePipeline.java:652)
20.04 10:36:01 [Server] WARN at RoseStacker-1.5.32.jar//dev.rosewood.rosestacker.spawning.MobSpawningMethod.spawnEntitiesIntoNearbyStacks(MobSpawningMethod.java:280)
20.04 10:36:01 [Server] WARN at RoseStacker-1.5.32.jar//dev.rosewood.rosestacker.spawning.MobSpawningMethod.lambda$spawn$3(MobSpawningMethod.java:159)
20.04 10:36:01 [Server] WARN at RoseStacker-1.5.32.jar//dev.rosewood.rosestacker.lib.rosegarden.scheduler.RoseScheduler.lambda$wrap$0(RoseScheduler.java:158)
20.04 10:36:01 [Server] WARN at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:78)
20.04 10:36:01 [Server] WARN at org.bukkit.craftbukkit.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:85)
20.04 10:36:01 [Server] WARN at com.destroystokyo.paper.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:22)
20.04 10:36:01 [Server] WARN at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
20.04 10:36:01 [Server] WARN at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
20.04 10:36:01 [Server] WARN at java.base/java.lang.VirtualThread.run(VirtualThread.java:309)

[Esophose]

This shouldn't ever happen as witches aren't normally Ageable, only passive mobs that can be babies are. This suggests you have another plugin/mod on your server making custom mobs (or pets), RoseStacker doesn't play too well with others that mess with the server internals of mobs like that.

You should disable the settings causing the error in your entity_settings.yml file so this doesn't happen, in this particular case it is under the WITCH section called dont-stack-if-different-age that you will want to set to false. That setting shouldn't normally exist on vanilla servers.

If you aren't aware of any installed plugin/mod that could be causing this, please let me know and I can take a deeper look.