Since today I can't use the website anymore.
I can only see the top menu (home, single player, etc.) and navigate to what I believe are normal ASP pages (News, About, Maps, etc.).

Multiplayer and Single Player sections are not working.
I tried with the latest versions of Chrome, Firefox and Opera on OSX.

The Android app is working and I'm connected to the same network as my Mac, so I'm excluding network problems.

It works for me, I think you should read this: http://wiki.warlight.net/index.php/Black_screen