[Server thread/ERROR]: Could not pass event CreatureSpawnEvent to LorinthsRpgMobs v1.5.2
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:299) ~[spigot.jar:git-Spigot-1554]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-1554]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-1554]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-1554]
	at org.bukkit.craftbukkit.v1_7_R4.event.CraftEventFactory.callCreatureSpawnEvent(CraftEventFactory.java:292) [spigot.jar:git-Spigot-1554]
	at net.minecraft.server.v1_7_R4.World.addEntity(World.java:1095) [spigot.jar:git-Spigot-1554]
	at net.minecraft.server.v1_7_R4.SpawnerCreature.spawnEntities(SpawnerCreature.java:185) [spigot.jar:git-Spigot-1554]
	at net.minecraft.server.v1_7_R4.WorldServer.doTick(WorldServer.java:189) [spigot.jar:git-Spigot-1554]
	at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:687) [spigot.jar:git-Spigot-1554]
	at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289) [spigot.jar:git-Spigot-1554]
	at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584) [spigot.jar:git-Spigot-1554]
	at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490) [spigot.jar:git-Spigot-1554]
	at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [spigot.jar:git-Spigot-1554]
Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Double
	at me.Lorinth.MobDifficulty.MobDifficulty.getMobHealth(MobDifficulty.java:862) ~[?:?]
	at me.Lorinth.MobDifficulty.MobDifficulty.onEntitySpawn(MobDifficulty.java:1534) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_05]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_05]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:296) ~[spigot.jar:git-Spigot-1554]
	... 12 more