AOSpeedOMeter

Error while running the chunk
  [string "Mods/Addons/AOSpeedOMeter/Scripts/LibDnD.lua"]:78: attempt to call a table value
  func: (for generator), local, line: -1, defined: C, line: -1, [C]
    func: GetWidgetID, field, line: 78, defined: Lua, line: 76, [string "Mods/Addons/AOSpeedOMeter/Scripts/LibDnD.lua"]
      func: Register, field, line: 86, defined: Lua, line: 84, [string "Mods/Addons/AOSpeedOMeter/Scripts/LibDnD.lua"]
        func: Init, method, line: 47, defined: Lua, line: 7, [string "Mods/Addons/AOSpeedOMeter/Scripts/LibDnD.lua"]
          func: Init, global, line: 38, defined: Lua, line: 34, [string "Mods/Addons/AOSpeedOMeter/Scripts/AOSpeedOMeter.lua"]
            func: ?, ?, line: 40, defined: main, line: 0, [string "Mods/Addons/AOSpeedOMeter/Scripts/AOSpeedOMeter.lua"]