Problem with establishing connections

Last days we are several persons with diffrent user id/lisences, having problems when connecting to other stored connections. We are logged in, and all seems normal, as it says "waiting for connection". When we try to connect, it tryes in 20 seconds before it says "failed to connect". It is problem to connect at all from my user, and to all stored conections. We`re using newest version on devices. Have commercial lisence, and it is not expired. Problems are same using pc or android device. It suddenly appeared yesterday. We`re using it in commercial, and support for our customers. What do we do, and where can we get help?