Error when people log in

For some reason when ever the server starts I get this massive error:

Code:

java.lang.NullPointerException
    at org.anjocaido.groupmanager.dataholder.WorldDataHolder.load(WorldDataHolder.java:589)
    at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadWorld(WorldsHolder.java:351)
    at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.initialLoad(WorldsHolder.java:64)
    at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.<init>(WorldsHolder.java:56)
    at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:76)
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:118)
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:414)
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:187)
    at com.nijikokun.bukkit.Permissions.Permissions.onEnable(Permissions.java:64)
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:118)
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:414)
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:187)
    at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:83)
    at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:61)
    at net.minecraft.server.MinecraftServer.e(MinecraftServer.java:204)
    at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:191)
    at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:131)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:246)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:366)

and when ever someone logs in I get this error:

Code:

2011-03-06 10:21:50 [SEVERE] java.lang.NullPointerException
2011-03-06 10:21:50 [SEVERE]     at com.sk89q.bukkit.migration.NijiPermissionsResolver.inGroup(NijiPermissionsResolver.java:70)
2011-03-06 10:21:50 [SEVERE]     at com.sk89q.bukkit.migration.PermissionsResolverManager.inGroup(PermissionsResolverManager.java:90)
2011-03-06 10:21:50 [SEVERE]     at com.sk89q.worldguard.bukkit.WorldGuardPlugin.inGroup(WorldGuardPlugin.java:1375)
2011-03-06 10:21:50 [SEVERE]     at com.sk89q.worldguard.bukkit.WorldGuardPlayerListener.onPlayerJoin(WorldGuardPlayerListener.java:68)
2011-03-06 10:21:50 [SEVERE]     at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:125)
2011-03-06 10:21:50 [SEVERE]     at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:59)
2011-03-06 10:21:50 [SEVERE]     at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:225)
2011-03-06 10:21:50 [SEVERE]     at net.minecraft.server.ServerConfigurationManager.a(ServerConfigurationManager.java:98)
2011-03-06 10:21:50 [SEVERE]     at net.minecraft.server.NetLoginHandler.b(NetLoginHandler.java:87)
2011-03-06 10:21:50 [SEVERE]     at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:27)
2011-03-06 10:21:50 [SEVERE]     at net.minecraft.server.NetworkListenThread.a(SourceFile:87)
2011-03-06 10:21:50 [SEVERE]     at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:357)
2011-03-06 10:21:50 [SEVERE]     at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:272)
2011-03-06 10:21:50 [SEVERE]     at net.minecraft.server.ThreadServerApplication.run(SourceFile:366)
2011-03-06 10:21:50 [SEVERE] java.lang.NullPointerException
2011-03-06 10:21:50 [SEVERE]     at com.sk89q.bukkit.migration.NijiPermissionsResolver.inGroup(NijiPermissionsResolver.java:70)
2011-03-06 10:21:50 [SEVERE]     at com.sk89q.bukkit.migration.PermissionsResolverManager.inGroup(PermissionsResolverManager.java:90)
2011-03-06 10:21:50 [SEVERE]     at com.sk89q.worldguard.bukkit.WorldGuardPlugin.inGroup(WorldGuardPlugin.java:1375)
2011-03-06 10:21:50 [SEVERE]     at com.sk89q.worldguard.bukkit.WorldGuardPlayerListener.onPlayerJoin(WorldGuardPlayerListener.java:72)
2011-03-06 10:21:50 [SEVERE]     at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:125)
2011-03-06 10:21:50 [SEVERE]     at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:59)
2011-03-06 10:21:50 [SEVERE]     at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:225)
2011-03-06 10:21:50 [SEVERE]     at net.minecraft.server.ServerConfigurationManager.a(ServerConfigurationManager.java:98)
2011-03-06 10:21:50 [SEVERE]     at net.minecraft.server.NetLoginHandler.b(NetLoginHandler.java:87)
2011-03-06 10:21:50 [SEVERE]     at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:27)
2011-03-06 10:21:50 [SEVERE]     at net.minecraft.server.NetworkListenThread.a(SourceFile:87)
2011-03-06 10:21:50 [SEVERE]     at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:357)
2011-03-06 10:21:50 [SEVERE]     at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:272)
2011-03-06 10:21:50 [SEVERE]     at net.minecraft.server.ThreadServerApplication.run(SourceFile:366)

This is starting to get really annoying and I can figure out how to fix it
I am running craft bukkit 493 and as far as I can tell it is coming from group manager.
Any help?

 

Both of them have to do something with permissions. Are they up to date?

 

Well
I am running group manager does that mean that the permissions hook in group manager might not be working correctly or could it be that I still have the permissions folder without the .jar will in my plugins folder.