GroupManager Help

Code:

[SEVERE] null loading Permissions v2.5.1 (Is it up to date?)
java.lang.NullPointerException
    at org.anjocaido.groupmanager.dataholder.WorldDataHolder.load(WorldDataHolder.java:574)
    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:73)
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:118)
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:451)
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:217)
    at com.nijikokun.bukkit.Permissions.Permissions.onEnable(Permissions.java:61)
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:118)
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:451)
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:217)
    at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:85)
    at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:63)
    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)

I have the latest update of all, even tried with other craftbukkit versions

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