The only error message is “The operation has timed out”, no other error message.
The sign-in button just no response.
There is no issue before this month working in my home, it happens a week before, but I don’t have time to solve the issue that time, after back office, the issue was auto recovered.
After I did reinstall UiPath few rounds still cannot solve the issue, so I think maybe try other location. I just change an IP address to test, so the problem solved by luck.