22:50:20 [SEVERE] Could not pass event PlayerQuitEvent to Herochat
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:303)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:459)
        at net.minecraft.server.ServerConfigurationManager.disconnect(ServerConfigurationManager.java:178)
        at net.minecraft.server.NetServerHandler.disconnect(NetServerHandler.java:158)
        at org.bukkit.craftbukkit.entity.CraftPlayer.kickPlayer(CraftPlayer.java:220)
        at me.dakoslug.EmergencyDowntime.EmergencyDowntimeplayerListener.onPlayerJoin(EmergencyDowntimeplayerListener.java:30)
        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:601)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:459)
        at net.minecraft.server.ServerConfigurationManager.c(ServerConfigurationManager.java:132)
        at net.minecraft.server.NetLoginHandler.b(NetLoginHandler.java:129)
        at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:41)
        at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:61)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:554)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:452)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)
Caused by: java.lang.NullPointerException
        at com.dthielke.herochat.YMLChatterStorage.update(YMLChatterStorage.java:87)
        at com.dthielke.herochat.YMLChatterStorage.removeChatter(YMLChatterStorage.java:70)
        at com.dthielke.herochat.ChatterManager.removeChatter(ChatterManager.java:61)
        at com.dthielke.herochat.ChatterManager.removeChatter(ChatterManager.java:72)
        at com.dthielke.herochat.HCPlayerListener.onPlayerQuit(HCPlayerListener.java:40)
        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:601)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301)
        ... 20 more