[Server thread/ERROR]: Could not pass event EntityDamageByEntityEvent to InsaneMobs v1.9.6
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:299) ~[spigot.jar:git-Spigot-1543]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-1543]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-1543]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-1543]
	at org.bukkit.craftbukkit.v1_7_R3.event.CraftEventFactory.callEvent(CraftEventFactory.java:109) [spigot.jar:git-Spigot-1543]
	at org.bukkit.craftbukkit.v1_7_R3.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:550) [spigot.jar:git-Spigot-1543]
	at org.bukkit.craftbukkit.v1_7_R3.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:463) [spigot.jar:git-Spigot-1543]
	at org.bukkit.craftbukkit.v1_7_R3.event.CraftEventFactory.handleNonLivingEntityDamageEvent(CraftEventFactory.java:580) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.EntityFireball.damageEntity(EntityFireball.java:247) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.EntityLargeFireball.a(EntityLargeFireball.java:20) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.EntityFireball.h(EntityFireball.java:131) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.World.entityJoinedWorld(World.java:1602) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.World.playerJoinedWorld(World.java:1577) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.World.tickEntities(World.java:1442) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.WorldServer.tickEntities(WorldServer.java:516) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:703) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:284) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:584) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:490) [spigot.jar:git-Spigot-1543]
	at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [spigot.jar:git-Spigot-1543]
Caused by: java.lang.ClassCastException: org.bukkit.craftbukkit.v1_7_R3.entity.CraftLargeFireball cannot be cast to org.bukkit.entity.LivingEntity
	at me.sueswol.insanemobs.spawncommand.onDarkKnightDamage(spawncommand.java:788) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor470.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:296) ~[spigot.jar:git-Spigot-1543]
	... 19 more