AcAddon

Error while running the chunk
  [string "Mods/Addons/AcAddon/Scripts/Ac_Script.lua"]:0: bad argument #1 to '' (table expected, got nil)
  func: ?, ?, line: -1, defined: C, line: -1, [C]
    func: , upvalue, line: -1, defined: C, line: -1, [C]
      func: Group_Get_Member, field, line: 0, defined: Lua, line: 0, [string "Mods/Addons/AcAddon/Scripts/Ac_Script.lua"]
        func: Events, field, line: 0, defined: Lua, line: 0, [string "Mods/Addons/AcAddon/Scripts/Ac_Script.lua"]
          func: ?, ?, line: 0, defined: Lua, line: 0, [string "..."]
            func: Show, method, line: 0, defined: Lua, line: 0, [string "Mods/Addons/AcAddon/Scripts/Ac_Script.lua"]
              func: Start, field, line: 0, defined: Lua, line: 0, [string "..."]
                func: ?, ?, line: 0, defined: Lua, line: 0, [string "..."]
                  func: ?, ?, line: 0, defined: Lua, line: 0, [string "125850"]
                    func: ?, ?, line: 0, defined: Lua, line: 0, [string "125850"]
                      func: ?, ?, line: 1, defined: main, line: 0, [string "Mods/Addons/AcAddon/Scripts/MainScript.lua"]