What do you mean chat does not work, You can't open the chat window or what? Because I just tested it it opens properly. Have you tried to enable dev mode and clear the cache in your browser?
nevermind it doesn't work on any page. It works with the admin panel but on the other pages of the site it is not working. I mean the chat box is not popuping up and says 0 users but when i go to the admin section it works. Could be a theme issue