AoUMeter

Error while running the chunk
  [string "Mods/Addons/AoUMeter/Scripts/AOClassLibrary.lua"]:154: attempt to call a table value
  func: (for generator), local, line: -1, defined: C, line: -1, [C]
    func: RegisterEventHandlers, global, line: 154, defined: Lua, line: 153, [string "Mods/Addons/AoUMeter/Scripts/AOClassLibrary.lua"]
      func: Init, global, line: 829, defined: Lua, line: 828, [string "Mods/Addons/AoUMeter/Scripts/AoUMeter.lua"]
        func: ?, ?, line: 904, defined: main, line: 0, [string "Mods/Addons/AoUMeter/Scripts/AoUMeter.lua"]