[19:56:53] [Server thread/ERROR]: Could not pass event EntityDamageByEntityEvent to LorinthsRpgMobs v1.5.2
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:320) ~[craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at org.bukkit.plugin.TimedRegisteredListener.callEvent(TimedRegisteredListener.java:30) ~[craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:487) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:472) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.callEvent(CraftEventFactory.java:99) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:403) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:431) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.EntityLiving.damageEntity(EntityLiving.java:663) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.EntityMonster.damageEntity(EntityMonster.java:47) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.EntityMonster.m(EntityMonster.java:99) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.EntityCaveSpider.m(SourceFile:24) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.EntityMonster.a(EntityMonster.java:127) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.EntitySpider.a(EntitySpider.java:90) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.EntityCreature.bq(EntityCreature.java:67) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.EntityLiving.e(EntityLiving.java:1447) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.EntityInsentient.e(EntityInsentient.java:306) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.EntityMonster.e(EntityMonster.java:20) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.EntityLiving.h(EntityLiving.java:1306) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.EntityInsentient.h(EntityInsentient.java:150) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.EntityMonster.h(EntityMonster.java:24) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.EntitySpider.h(EntitySpider.java:21) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.World.entityJoinedWorld(World.java:1487) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.World.playerJoinedWorld(World.java:1463) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.World.tickEntities(World.java:1332) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.WorldServer.tickEntities(WorldServer.java:514) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:673) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:273) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:562) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:469) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
Caused by: java.lang.NullPointerException
	at me.Lorinth.MobDifficulty.MobDifficulty.onEntityHit(MobDifficulty.java:1448) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor204.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:318) ~[craftbukkit.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	... 30 more