Royal commands derp

11:56:59 [SEVERE] Could not pass event PlayerLoginEvent to RoyalCommands
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:304)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:460)
        at net.minecraft.server.ServerConfigurationManager.attemptLogin(ServerConfigurationManager.java:227)
        at net.minecraft.server.NetLoginHandler.b(NetLoginHandler.java:102)
        at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:94)
        at net.minecraft.server.Packet1Login.handle(SourceFile:68)
        at net.minecraft.server.NetworkManager.b(NetworkManager.java:229)
        at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:48)
        at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:61)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:567)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:459)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
Caused by: java.lang.IllegalArgumentException: Player list names can only be a maximum of 16 characters long
        at org.bukkit.craftbukkit.entity.CraftPlayer.setPlayerListName(CraftPlayer.java:164)
        at org.royaldev.royalcommands.listeners.RoyalCommandsPlayerListener.displayNames(RoyalCommandsPlayerListener.java:305)
        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:302)
        ... 12 more