[WARNING] Could not properly handle event PLAYER_TELEPORT:
java.lang.IllegalAccessError: Synchronized code got accessed from another thread: net.minecraft.server.NetworkReaderThread
        at org.bukkit.event.Listener.onPlayerTeleport(Listener:0)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:339)
        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:462)
        at org.bukkit.craftbukkit.entity.CraftPlayer.teleport(CraftPlayer.java:356)
        at org.bukkit.craftbukkit.entity.CraftEntity.teleport(CraftEntity.java:162)
        at me.jamiemac262.ServerAIReWrite.ServerChatListener.onPlayerChat(ServerChatListener.java:223)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:616)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:339)
        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:831)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:808)
        at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:44)
        at net.minecraft.server.NetworkManager.i(NetworkManager.java:211)
        at net.minecraft.server.NetworkManager.c(NetworkManager.java:332)
        at net.minecraft.server.NetworkReaderThread.run(SourceFile:93)
22:10:17 [INFO] This error is logged only once: it could have occurred multiple times by now.
22:10:17 [INFO] Please contact one of the authors of plugin 'ServerAI':