"Permission denied. (-455)"

I have got a login failure which reports the following error message "Permission denied. (-455)".

The username and password I'm using are shared with my team and I am the only one who experiencing this issue. I exclude that credentials can be the problem.

I have Windows 10 and I have downloaded directly from the website this version of FortiClient: FortiClientOnlineInstaller_6.0.0.

Any recommendation?