ATT

Error while running the chunk
  [string "Mods/Addons/ATT/Scripts/ATT.lua"]:114: bad argument #1 to 'pairs' (table expected, got nil)
  func: ?, ?, line: -1, defined: C, line: -1, [C]
    func: pairs, global, line: -1, defined: C, line: -1, [C]
      func: add_marker, global, line: 114, defined: Lua, line: 101, [string "Mods/Addons/ATT/Scripts/ATT.lua"]
        func: ?, ?, line: 275, defined: Lua, line: 241, [string "Mods/Addons/ATT/Scripts/ATT.lua"]