I just quitted playing some hours ago, now i want to play again but no matter which server i choose i get "Not connected" (Official servers, user-created servers, tourneys, i cant connect in any)

maybe ur internet connection is lost ...

maybe there is a proxy server somewhere.

Maybe Admin and SMod running Maintenace

It has happened to me too, got that Not Connected message without any reason.

Just keep typing /jo <roomname>, sometime it works

I think that's normal.
Because every 5:00 PM here, I also get the "not connected" status.
And when it is 5:09 PM, I can Play again!