I use this site all of the time, with no problems. Last time was last night or possibly after midnight making it today. I have been trying to sign in tonight many, many times in the last hour and all it does is hang. I get no error message, it just keeps hanging. I have no idea what is causing this. My internet is working fine. Please fix this soon, because I love the game and play a lot.
The problem is not on your side, everybody has this problem. Some server is down, Stef has been alerted via internet, so this will hopefully be fixed soon.