The Windows client is broken on my system. Through testing I have determined that the issue is not server related. I have tried to connect to multiple nextcloud servers but I get the same timeout error for all of them. Last month I had the client break spontaneously on me and I managed to get it working again by doing a Windows System Restore. It worked for two weeks and then recently broke again with the same issue. According to the logs the client times out when trying to check the status.php page of the nextcloud server. From my web browser I can navigate to https://nextcloud.whatever.com/status.php just fine and see the information of my server. All my other computer clients work just fine.
Here are the logs from the client: https://pastebin.com/HfeRnSUr
Wireshark Packet Capture: https://packettotal.com/app/analysis?id=57653a9c2eca97eeec6130cc4fd13376
I have tried uninstalling the client and reinstalling it but that did not fix the issue. I even tried installing the latest version of the Owncloud client but that had the same issue, even when trying to connect to official owncloud servers.
Operating System: Windows 10 Pro Build 1709
Nextcloud Client: 2.3.3 Build 1
Security Software: I don’t have any 3rd party antivirus or security software installed that could be blocking the program. The Windows Firewall does not restrict outbound traffic.