error log

2013-10-26 13-20
=============================== GM ERROR LOG ===============================
= ERROR REPORT START - 2.0 (2.12.1) (Phoenix) =

java.lang.IllegalArgumentException: The following file couldn't pass on Parser.
plugins\GroupManager\worlds\hunger games\users.yml
	at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadUsers(WorldDataHolder.java:758)
	at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadUsers(WorldDataHolder.java:433)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadWorld(WorldsHolder.java:684)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadWorld(WorldsHolder.java:640)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.initialWorldLoading(WorldsHolder.java:110)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.initialLoad(WorldsHolder.java:100)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.resetWorldsHolder(WorldsHolder.java:92)
	at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.<init>(WorldsHolder.java:59)
	at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:169)
	at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:93)
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:457)
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381)
	at org.bukkit.craftbukkit.v1_6_R3.CraftServer.loadPlugin(CraftServer.java:284)
	at org.bukkit.craftbukkit.v1_6_R3.CraftServer.enablePlugins(CraftServer.java:266)
	at net.minecraft.server.v1_6_R3.MinecraftServer.l(MinecraftServer.java:315)
	at net.minecraft.server.v1_6_R3.MinecraftServer.f(MinecraftServer.java:292)
	at net.minecraft.server.v1_6_R3.MinecraftServer.a(MinecraftServer.java:252)
	at net.minecraft.server.v1_6_R3.DedicatedServer.init(DedicatedServer.java:152)
	at net.minecraft.server.v1_6_R3.MinecraftServer.run(MinecraftServer.java:393)
	at net.minecraft.server.v1_6_R3.ThreadServerApplication.run(SourceFile:583)
Caused by: java.lang.NullPointerException
	at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadUsers(WorldDataHolder.java:755)
	... 20 more