at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:181) at org.anjocaido.groupmanager.GroupManager.onCommand(GroupManager.java:1827) at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:648) at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchServerCommand(CraftServer.java:634) at net.minecraft.server.v1_12_R1.DedicatedServer.aP(DedicatedServer.java:444) at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:407) at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) at java.lang.Thread.run(Unknown Source) help me pls not have idear EDIT by Moderator: merged posts, please use the edit button instead of double posting.