ERROR]: Could not pass event EntityDeathEvent to CombatTag v6.3.2-SNAPSHOT
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:305) ~[spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at net.aufdemrand.sentry.SentryInstance.die(SentryInstance.java:556) [sentry.jar:?]
	at net.aufdemrand.sentry.SentryInstance.onDamage(SentryInstance.java:1232) [sentry.jar:?]
	at net.aufdemrand.sentry.SentryListener.onDamage(SentryListener.java:270) [sentry.jar:?]
	at sun.reflect.GeneratedMethodAccessor269.invoke(Unknown Source) ~[?:?]
	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_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at org.bukkit.craftbukkit.v1_8_R1.event.CraftEventFactory.callEvent(CraftEventFactory.java:85) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at org.bukkit.craftbukkit.v1_8_R1.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:538) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at org.bukkit.craftbukkit.v1_8_R1.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:451) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at org.bukkit.craftbukkit.v1_8_R1.event.CraftEventFactory.handleLivingEntityDamageEvent(CraftEventFactory.java:570) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at net.minecraft.server.v1_8_R1.EntityLiving.d(EntityLiving.java:1096) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at net.minecraft.server.v1_8_R1.EntityHuman.d(EntityHuman.java:860) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at net.minecraft.server.v1_8_R1.EntityLiving.damageEntity(EntityLiving.java:737) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at net.minecraft.server.v1_8_R1.EntityHuman.damageEntity(EntityHuman.java:801) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at net.minecraft.server.v1_8_R1.EntityPlayer.damageEntity(EntityPlayer.java:486) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at net.minecraft.server.v1_8_R1.EntityHuman.attack(EntityHuman.java:1002) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at net.minecraft.server.v1_8_R1.EntityPlayer.attack(EntityPlayer.java:1051) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:1312) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at net.minecraft.server.v1_8_R1.PacketPlayInUseEntity.a(SourceFile:52) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at net.minecraft.server.v1_8_R1.PacketPlayInUseEntity.a(SourceFile:11) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.7.0_71]
	at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.7.0_71]
	at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:696) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:634) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:537) [spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at java.lang.Thread.run(Unknown Source) [?:1.7.0_71]
Caused by: java.lang.IllegalArgumentException: UUID cannot be null
	at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at org.bukkit.craftbukkit.v1_8_R1.CraftServer.getOfflinePlayer(CraftServer.java:1309) ~[spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at org.bukkit.Bukkit.getOfflinePlayer(Bukkit.java:755) ~[spigot_server.jar:git-Spigot-bf0ac55-3ee97a3]
	at com.trc202.CombatTag.OfflinePlayerLoader.loadPlayer(OfflinePlayerLoader.java:79) ~[?:?]
	at com.trc202.CombatTag.CombatTag.updatePlayerData(CombatTag.java:451) ~[?:?]
	at com.trc202.CombatTagListeners.NoPvpEntityListener.onNPCDeath(NoPvpEntityListener.java:71) ~[?:?]
	at com.trc202.CombatTagListeners.NoPvpEntityListener.onEntityDeath(NoPvpEntityListener.java:62) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor396.invoke(Unknown Source) ~[?:?]
	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_server.jar:git-Spigot-bf0ac55-3ee97a3]
	... 35 more