Connection client stuck at "Working..."

I have a computer with Bentley Connection client but no one can login. It is just stuck on "Working...".

I have tried reinstalling the program to latest version. I have also tried this command: "C:\Program Files\Common Files\Bentley Shared\CONNECTION Client\Bentley.Connect.Client.exe" - noautosso

And I have tried deleting .db files in the user profile, but nothing works. Still just this message. Any idea of how to get this back on track? It has worked before on this computer.