I've had the same issue on my Windows 7 PC since the update to the servers on Friday. Interestingly I installed it on my Son's Windows 10 PC on the same network and that has no issues connecting. I've tried changing to a different network adapter and IP address on the Win 7 PC and the issue still exists. I also uninstalled / reinstalled and that didn't help. I at least now know it's not my network, but possibly some difference in the way the 2 machines are connecting.