Looks like there is a problem that is being looked into. Same problems reported in this topic.
Frozen game
http://www.chess.com/echess/game.html?id=45006673
I have made my move, but the game has locked up. Thanks for looking into this.
We're working on getting this fixed asap. Sorry 
If you need help, please contact our Help and Support team.
http://www.chess.com/echess/game.html?id=45006673
I have made my move, but the game has locked up. Thanks for looking into this.