For information: I am having the same issue.
Server is a Windows 10 Home PC – server works fine.
Viewer is a Surface Pro 6 running Windows 10. This was working fine until around 0900hrs (GMT) on Sunday.
Now loading the programme causes a very brief screen to load and then disappear. Nothing running in the background.
Running the HTML version also gives the same error as mentioned in a previous post (I’m not clued-up on HTML so decided to abandon this.)
Installed the viewer on my MotoG50 phone and it works fine. Also tried loading the viewer on my Windows 10 PC which also works fine.
Cannot roll back to a previous update on the Surface Pro so cannot test.
Disabled the firewall but same results.
Hope this helps.
Andrew
