RotAG-Groups [Unmaintained]

I hope someone can rewrite RotAG - Groups

 

when I do /group list that not show my group is it normally?
damn finaly error:

Code:

[Error] Failed to call hook 'C_Group' on plugin 'RotAG-Groups v1.7.3'
File: RotAG-Groups.lua Line: 402 attempt to index field '?' (a nil value):
  at NLua.Lua.ThrowExceptionFromError (Int32 oldTop) [0x00000] in <filename unknown>:0 
  at NLua.Lua.CallFunction (System.Object function, System.Object[] args, System.Type[] returnTypes) [0x00000] in <filename unknown>:0 
  at NLua.Lua.CallFunction (System.Object function, System.Object[] args) [0x00000] in <filename unknown>:0 
  at NLua.LuaFunction.Call (System.Object[] args) [0x00000] in <filename unknown>:0 
  at Oxide.Ext.Lua.Plugins.LuaPlugin.OnCallHook (System.String hookname, System.Object[] args) [0x00000] in <filename unknown>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hookname, System.Object[] args) [0x00000] in <filename unknown>:0 
[Error] Failed to call hook 'OnPlayerChat' on plugin 'RotAG-Groups v1.7.3'
File: RotAG-Groups.lua Line: 738 attempt to concatenate local 'realName' (a nil value):
  at NLua.Lua.ThrowExceptionFromError (Int32 oldTop) [0x00000] in <filename unknown>:0 
  at NLua.Lua.CallFunction (System.Object function, System.Object[] args, System.Type[] returnTypes) [0x00000] in <filename unknown>:0 
  at NLua.Lua.CallFunction (System.Object function, System.Object[] args) [0x00000] in <filename unknown>:0 
  at NLua.LuaFunction.Call (System.Object[] args) [0x00000] in <filename unknown>:0 
  at Oxide.Ext.Lua.Plugins.LuaPlugin.OnCallHook (System.String hookname, System.Object[] args) [0x00000] in <filename unknown>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hookname, System.Object[] args) [0x00000] in <filename unknown>:0