Yeah, all the services are running and I can get to the hub from a browser on the server.
I think there is something wrong from the System side.
The thing is that we had one server and then we bought a new one.
I've made QS server installation on the new server and transferred there QS projects.
From the system side, they're saying that they REDIRECTED THE SAME EXTERNAL ADDRESS from the old server to the new server, so now it's supposed to point to a new server's internal address and not to the old one.
I guess something went wrong in this redirecting. I'm not a system person, but maybe someone here can give me an insight so I can suggest to the System here what to do or what to check.