Group Manager Error

30.10 14:25:41 [Server] INFO ... 12 more
30.10 14:25:41 [Server] INFO at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:161)
30.10 14:25:41 [Server] INFO at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.<init>(WorldsHolder.java:59)
30.10 14:25:41 [Server] INFO at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.resetWorldsHolder(WorldsHolder.java:70)
30.10 14:25:41 [Server] INFO at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.initialLoad(WorldsHolder.java:82)
30.10 14:25:41 [Server] INFO at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadAllSearchedWorlds(WorldsHolder.java:125)
30.10 14:25:41 [Server] INFO at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadWorld(WorldsHolder.java:591)
30.10 14:25:41 [Server] INFO at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadWorld(WorldsHolder.java:629)
30.10 14:25:41 [Server] INFO at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:417)
30.10 14:25:41 [Server] INFO at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:497)
30.10 14:25:41 [Server] INFO plugins/GroupManager/worlds/oiu/groups.yml
30.10 14:25:41 [Server] INFO Caused by: java.lang.IllegalArgumentException: The following file couldn't pass on Parser.
30.10 14:25:41 [Server] INFO at net.minecraft.server.ThreadServerApplication.run(SourceFile:818)
30.10 14:25:41 [Server] INFO at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:391)
30.10 14:25:41 [Server] INFO at net.minecraft.server.DedicatedServer.init(DedicatedServer.java:141)
30.10 14:25:41 [Server] INFO at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:249)
30.10 14:25:41 [Server] INFO at net.minecraft.server.MinecraftServer.e(MinecraftServer.java:290)
30.10 14:25:41 [Server] INFO at net.minecraft.server.MinecraftServer.j(MinecraftServer.java:311)
30.10 14:25:41 [Server] INFO at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:252)
30.10 14:25:41 [Server] INFO at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:270)
30.10 14:25:41 [Server] INFO at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:381)
30.10 14:25:41 [Server] INFO at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:374)
30.10 14:25:41 [Server] INFO at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:217)
30.10 14:25:41 [Server] INFO at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:85)
30.10 14:25:41 [Server] INFO at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:230)
30.10 14:25:41 [Server] INFO plugins/GroupManager/worlds/oiu/groups.yml
30.10 14:25:41 [Server] INFO java.lang.IllegalArgumentException: The following file couldn't pass on Parser.
30.10 14:25:41 [Server] SEVERE Error occurred while enabling GroupManager v2.0 (2.9.4) (Phoenix) (Is it up to date?)
30.10 14:25:41 [Server] INFO [GroupManager] Enabling GroupManager v2.0 (2.9.4) (Phoenix)