DarkDPSMeter

Error while running the chunk
  [string "Mods/Addons/DarkDPSMeter/Scripts/AOClassLibrary.lua"]:127: attempt to call a table value
  func: (for generator), local, line: -1, defined: C, line: -1, [C]
    func: RegisterEventHandlers, global, line: 127, defined: Lua, line: 126, [string "Mods/Addons/DarkDPSMeter/Scripts/AOClassLibrary.lua"]
      func: Init, global, line: 442, defined: Lua, line: 441, [string "Mods/Addons/DarkDPSMeter/Scripts/DarkDPSMeter.lua"]
        func: ?, ?, line: 512, defined: main, line: 0, [string "Mods/Addons/DarkDPSMeter/Scripts/DarkDPSMeter.lua"]