[18:34:11] [Server thread/ERROR]: Could not pass event PlayerLevelUpEvent to PlayerLevels v1.7.3
org.bukkit.event.EventException: null
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot131.jar:git-Spigot-7754231-94b0980]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot131.jar:git-Spigot-7754231-94b0980]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:499) [spigot131.jar:git-Spigot-7754231-94b0980]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:484) [spigot131.jar:git-Spigot-7754231-94b0980]
	at me.arkasher.playerLevel.api.API.verifyEXP(API.java:510) [PlayerLevel.jar:?]
	at me.arkasher.playerLevel.listeners.LevelUP.onDeath(LevelUP.java:346) [PlayerLevel.jar:?]
	at sun.reflect.GeneratedMethodAccessor453.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_181]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_181]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) [spigot131.jar:git-Spigot-7754231-94b0980]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) [spigot131.jar:git-Spigot-7754231-94b0980]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:499) [spigot131.jar:git-Spigot-7754231-94b0980]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:484) [spigot131.jar:git-Spigot-7754231-94b0980]
	at org.bukkit.craftbukkit.v1_12_R1.event.CraftEventFactory.callEntityDeathEvent(CraftEventFactory.java:394) [spigot131.jar:git-Spigot-7754231-94b0980]
	at net.minecraft.server.v1_12_R1.EntityLiving.die(EntityLiving.java:1109) [spigot131.jar:git-Spigot-7754231-94b0980]
	at net.minecraft.server.v1_12_R1.EntitySkeleton.die(EntitySkeleton.java:46) [spigot131.jar:git-Spigot-7754231-94b0980]
	at net.minecraft.server.v1_12_R1.EntityLiving.damageEntity(EntityLiving.java:951) [spigot131.jar:git-Spigot-7754231-94b0980]
	at net.minecraft.server.v1_12_R1.EntityMonster.damageEntity(EntityMonster.java:44) [spigot131.jar:git-Spigot-7754231-94b0980]
	at net.minecraft.server.v1_12_R1.EntityHuman.attack(EntityHuman.java:1030) [spigot131.jar:git-Spigot-7754231-94b0980]
	at net.minecraft.server.v1_12_R1.EntityPlayer.attack(EntityPlayer.java:1302) [spigot131.jar:git-Spigot-7754231-94b0980]
	at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:1616) [spigot131.jar:git-Spigot-7754231-94b0980]
	at de.robingrether.idisguise.management.channel.InjectedPlayerConnection1121.a(InjectedPlayerConnection1121.java:63) [iDisguise.jar:?]
	at net.minecraft.server.v1_12_R1.PacketPlayInUseEntity.a(SourceFile:69) [spigot131.jar:git-Spigot-7754231-94b0980]
	at net.minecraft.server.v1_12_R1.PacketPlayInUseEntity.a(SourceFile:13) [spigot131.jar:git-Spigot-7754231-94b0980]
	at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) [spigot131.jar:git-Spigot-7754231-94b0980]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_181]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_181]
	at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) [spigot131.jar:git-Spigot-7754231-94b0980]
	at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:748) [spigot131.jar:git-Spigot-7754231-94b0980]
	at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [spigot131.jar:git-Spigot-7754231-94b0980]
	at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [spigot131.jar:git-Spigot-7754231-94b0980]
	at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [spigot131.jar:git-Spigot-7754231-94b0980]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_181]
Caused by: java.lang.IllegalArgumentException: No enum constant org.bukkit.Sound.LEVEL_UP
	at java.lang.Enum.valueOf(Enum.java:238) ~[?:1.8.0_181]
	at org.bukkit.Sound.valueOf(Sound.java:1) ~[spigot131.jar:git-Spigot-7754231-94b0980]
	at me.arkasher.playerLevel.listeners.LevelUP.onLevelUP(LevelUP.java:60) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor627.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_181]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_181]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[spigot131.jar:git-Spigot-7754231-94b0980]
	... 32 more