Hi, I’ve had a similar propblem that got solved in august but nothing has changed on my side since then and now of a sudden I can’t sign in again… 
The old post that got solved…
Hello TYRENS-Jonas,
I apologize for the delayed response. Can you verify that the ports are still open on your router/firewall?
Hi TYRENS-Jonas,
We haven’t heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you’re still experiencing this issue, please try the suggestion that I mentioned above then post back here with the requested info.
If you need anything else, feel free to ask.