Помогите Не работают Ability в MyItems

Например, добавил к предмету Ability Curse, Hungry, Blind, Weakness, и ни один из них не работают. Предварительно выставил дамаг на 9. При ударе любого моба, игрока, возникают эффект чёрных частиц, наносится 0 урона и собственно всё, никаких дебафов. Без этих Ability дамаг работает корректно. В консоли выводит вот что:

[20:36:24 ERROR]: Could not pass event EntityDamageByEntityEvent to MyItems vMysthoria
org.bukkit.event.EventException: null
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[Spigot.jar:git-Spigot-dcd1643-e60fc34]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[Spigot.jar:git-Spigot-dcd1643-e60fc34]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:500) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:485) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at org.bukkit.craftbukkit.v1_12_R1.event.CraftEventFactory.callEvent(CraftEventFactory.java:93) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at org.bukkit.craftbukkit.v1_12_R1.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:580) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at org.bukkit.craftbukkit.v1_12_R1.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:483) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at org.bukkit.craftbukkit.v1_12_R1.event.CraftEventFactory.handleLivingEntityDamageEvent(CraftEventFactory.java:612) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.EntityLiving.damageEntity0(EntityLiving.java:1346) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.EntityHuman.damageEntity0(EntityHuman.java:846) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.EntityLiving.damageEntity(EntityLiving.java:868) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.EntityHuman.damageEntity(EntityHuman.java:759) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.EntityPlayer.damageEntity(EntityPlayer.java:586) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.EntityHuman.attack(EntityHuman.java:1005) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.EntityPlayer.attack(EntityPlayer.java:1311) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1623) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.PacketPlayInUseEntity.a(SourceFile:69) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.PacketPlayInUseEntity.a(SourceFile:13) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_271]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_271]
at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:748) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [Spigot.jar:git-Spigot-dcd1643-e60fc34]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_271]
Caused by: java.lang.IllegalArgumentException: No enum constant org.bukkit.Sound.WITHER_HURT
at java.lang.Enum.valueOf(Unknown Source) ~[?:1.8.0_271]
at org.bukkit.Sound.valueOf(Sound.java:1) ~[Spigot.jar:git-Spigot-dcd1643-e60fc34]
at com.mysthoria.myitems.b.a(MainBridge.java:2036) ~[?:?]
at com.mysthoria.myitems.Y.a(Ability.java:128) ~[?:?]
at com.mysthoria.myitems.B.a(EventDamage.java:436) ~[?:?]
at sun.reflect.GeneratedMethodAccessor353.invoke(Unknown Source) ~[?:?]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_271]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_271]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[Spigot.jar:git-Spigot-dcd1643-e60fc34]
... 26 more
Сервер на Spigot 1.12.2