13:31:52 [SEVERE] Could not pass event PlayerQuitEvent to PurpleIRC v1.5.6
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
        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 net.minecraft.server.v1_6_R2.PlayerList.disconnect(PlayerList.java:258)
        at net.minecraft.server.v1_6_R2.PlayerConnection.a(PlayerConnection.java:690)
        at net.minecraft.server.v1_6_R2.NetworkManager.b(NetworkManager.java:302)
        at net.minecraft.server.v1_6_R2.PlayerConnection.e(PlayerConnection.java:118)
        at net.minecraft.server.v1_6_R2.ServerConnection.b(SourceFile:37)
        at net.minecraft.server.v1_6_R2.DedicatedServerConnection.b(SourceFile:30)
        at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:590)
        at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:226)
        at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:486)
        at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:419)
        at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)
Caused by: java.lang.NullPointerException
        at java.lang.String.replace(String.java:2180)
        at com.cnaude.purpleirc.Utilities.ChatTokenizer.gameChatToIRCTokenizer(ChatTokenizer.java:107)
        at com.cnaude.purpleirc.PurpleBot.gameQuit(PurpleBot.java:627)
        at com.cnaude.purpleirc.GameListeners.GameListeners.onPlayerQuitEvent(GameListeners.java:53)
        at sun.reflect.GeneratedMethodAccessor486.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
        ... 14 more