essentials permissions Help

Well out of nowhere i keep on getting this error, even if i use the default group config
build 953
Current Essentials version

[SEVERE] Error occurred while enabling GroupManager v1.0(alpha-5) [Zombie-Version, please switch to Permissions 3] (Is it up to date?): null
java.lang.NullPointerException
at org.anjocaido.groupmanager.dataholder.WorldDataHolder.load(WorldDataHolder.java:579)
at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadWorld(WorldsHolder.java:358)
at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.initialWorldLoading(WorldsHolder.java:68)
at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.initialLoad(WorldsHolder.java:63)
at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.<init>(WorldsHolder.java:56)
at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:77)
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:126)
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:857)
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:264)
at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:151)
at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:136)
at net.minecraft.server.MinecraftServer.e(MinecraftServer.java:284)
at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:271)
at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:148)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:335)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:422)

bump anyone??

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Use permissions 3.1.6
Essentials is soon dropping groupmanager.

 

I've been telling alot of people that, why are people still using GM?