Frequent Error

[bountyhunter72]

[SEVERE] Could not pass event AsyncPlayerChatEvent to MonsterTickets v1.06.org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:341)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:459)
at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:840)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:812)
at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:44)
at net.minecraft.server.NetworkManager.i(NetworkManager.java:208)
at net.minecraft.server.NetworkManager.c(NetworkManager.java:344)
at net.minecraft.server.NetworkReaderThread.run(SourceFile:93)
Caused by: java.lang.ArrayIndexOutOfBoundsException

Above occurs frequently with seemingly no specific event triggering it.