[04:31:56] [Server thread/ERROR]: Could not pass event ChunkUnloadEvent to MobStacker v2.0.0
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[custom18.jar:git-PaperSpigot-8b18730]
	at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:74) ~[custom18.jar:git-PaperSpigot-8b18730]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[custom18.jar:git-PaperSpigot-8b18730]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [custom18.jar:git-PaperSpigot-8b18730]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [custom18.jar:git-PaperSpigot-8b18730]
	at net.minecraft.server.v1_8_R3.ChunkProviderServer.unloadChunks(ChunkProviderServer.java:369) [custom18.jar:git-PaperSpigot-8b18730]
	at net.minecraft.server.v1_8_R3.WorldServer.doTick(WorldServer.java:234) [custom18.jar:git-PaperSpigot-8b18730]
	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:830) [custom18.jar:git-PaperSpigot-8b18730]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:378) [custom18.jar:git-PaperSpigot-8b18730]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:713) [custom18.jar:git-PaperSpigot-8b18730]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:616) [custom18.jar:git-PaperSpigot-8b18730]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_111]
Caused by: java.lang.IndexOutOfBoundsException: Index: 0
	at java.util.Collections$EmptyList.get(Collections.java:4454) ~[?:1.8.0_111]
	at com.kiwifisher.mobstacker.listeners.ChunkChangeListener.mobUnloadEvent(ChunkChangeListener.java:39) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor70.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_111]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_111]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:300) ~[custom18.jar:git-PaperSpigot-8b18730]
	... 11 more