[13:40:23] [Server thread/ERROR]: Could not pass event PlayerQuitEvent to CombatTag v6.3.2-SNAPSHOT
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:305) ~[spigot.jar:git-Spigot-4b89e7b-7d0f836]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-4b89e7b-7d0f836]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-4b89e7b-7d0f836]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-4b89e7b-7d0f836]
	at net.minecraft.server.v1_8_R2.PlayerList.disconnect(PlayerList.java:346) [spigot.jar:git-Spigot-4b89e7b-7d0f836]
	at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java:842) [spigot.jar:git-Spigot-4b89e7b-7d0f836]
	at net.minecraft.server.v1_8_R2.NetworkManager.l(NetworkManager.java:315) [spigot.jar:git-Spigot-4b89e7b-7d0f836]
	at net.minecraft.server.v1_8_R2.ServerConnection.c(ServerConnection.java:145) [spigot.jar:git-Spigot-4b89e7b-7d0f836]
	at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:809) [spigot.jar:git-Spigot-4b89e7b-7d0f836]
	at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:368) [spigot.jar:git-Spigot-4b89e7b-7d0f836]
	at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:651) [spigot.jar:git-Spigot-4b89e7b-7d0f836]
	at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:554) [spigot.jar:git-Spigot-4b89e7b-7d0f836]
	at java.lang.Thread.run(Unknown Source) [?:1.7.0_71]
Caused by: java.lang.ClassCastException: java.util.UUID cannot be cast to java.lang.String
	at net.citizensnpcs.npc.entity.HumanController.updateSkin(HumanController.java:100) ~[?:?]
	at net.citizensnpcs.npc.entity.HumanController.createEntity(HumanController.java:71) ~[?:?]
	at net.citizensnpcs.npc.AbstractEntityController.spawn(AbstractEntityController.java:36) ~[?:?]
	at net.citizensnpcs.npc.CitizensNPC.spawn(CitizensNPC.java:176) ~[?:?]
	at com.trc202.CombatTag.libs.npclib.citizens.CitizensNPC.spawn(CitizensNPC.java:62) ~[?:?]
	at com.trc202.CombatTag.NPCManager.spawnHumanNPC(NPCManager.java:41) ~[?:?]
	at com.trc202.CombatTag.CombatTag.spawnNpc(CombatTag.java:186) ~[?:?]
	at com.trc202.CombatTagListeners.NoPvpPlayerListener.onPlayerQuit(NoPvpPlayerListener.java:81) ~[?:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_71]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_71]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_71]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_71]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301) ~[spigot.jar:git-Spigot-4b89e7b-7d0f836]
	... 12 more