[18:22:53] [Server thread/ERROR]: Could not pass event CreatureSpawnEvent to ChunkSpawnerLimiter v3.0.4
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:305) ~[spigot.jar:git-Spigot-38b8866-d2c2630]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot.jar:git-Spigot-38b8866-d2c2630]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at org.bukkit.craftbukkit.v1_8_R1.event.CraftEventFactory.callCreatureSpawnEvent(CraftEventFactory.java:275) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.World.addEntity(World.java:1007) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.SpawnerCreature.a(SpawnerCreature.java:285) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.ChunkProviderGenerate.getChunkAt(SourceFile:474) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at org.bukkit.craftbukkit.v1_8_R1.generator.NormalChunkGenerator.getChunkAt(NormalChunkGenerator.java:51) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:268) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.Chunk.loadNearby(Chunk.java:982) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.ChunkProviderServer.originalGetChunkAt(ChunkProviderServer.java:184) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:116) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.PlayerChunk.<init>(PlayerChunk.java:36) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.PlayerChunkMap.a(PlayerChunkMap.java:91) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.PlayerChunkMap.b(PlayerChunkMap.java:170) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.PlayerChunkMap.movePlayer(PlayerChunkMap.java:247) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.PlayerList.d(PlayerList.java:302) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:442) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.PacketPlayInFlying.a(SourceFile:126) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.PacketPlayInPosition.a(SourceFile:57) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0]
	at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0]
	at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:686) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:627) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:530) [spigot.jar:git-Spigot-38b8866-d2c2630]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0]
Caused by: java.lang.RuntimeException: Already decorating
	at net.minecraft.server.v1_8_R1.BiomeDecorator.a(BiomeDecorator.java:66) ~[spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.BiomeBase.a(SourceFile:389) ~[spigot.jar:git-Spigot-38b8966-d2c2630]
	at net.minecraft.server.v1_8_R1.BiomeBigHills.a(SourceFile:47) ~[spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.ChunkProviderGenerate.getChunkAt(SourceFile:472) ~[spigot.jar:git-Spigot-38b8866-d2c2630]
	at org.bukkit.craftbukkit.v1_8_R1.generator.NormalChunkGenerator.getChunkAt(NormalChunkGenerator.java:51) ~[spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:268) ~[spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.Chunk.loadNearby(Chunk.java:953) ~[spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.ChunkProviderServer.originalGetChunkAt(ChunkProviderServer.java:184) ~[spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:116) ~[spigot.jar:git-Spigot-38b8866-d2c2630]
	at net.minecraft.server.v1_8_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:95) ~[spigot.jar:git-Spigot-38b8866-d2c2630]
	at org.bukkit.craftbukkit.v1_8_R1.CraftWorld.getChunkAt(CraftWorld.java:121) ~[spigot.jar:git-Spigot-38b8866-d2c2630]
	at com.cyprias.ChunkSpawnerLimiter.listeners.EntityListener.onCreatureSpawnEvent(EntityListener.java:49) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor137.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301) ~[spigot.jar:git-Spigot-38b8866-d2c2630]
	... 28 more