An error occurred during a connection to office365.sgu.edu.

Hello, I am unable to connect to a certain site on FireFox unless I am logged into NordVPN. The site works on other browsers though. I tried clearing cache and opening site in a new private window. This issue is recent, the site worked fine with or without VPN in the past. This is the message I get when trying to access the site without a VPN connection: '' Unable to connect An error occurred during a connection to office365.sgu.edu. * The site could be temporarily unavailable or too busy. Try again in a few moments. * If you are unable to load any pages, check your computer’s network connection. * If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the web.'' Would appreciate any help to resolve this issue, thank you.