Fortinet's days may be numbered, because their stock price is falling nearly as fast as Pelosi's tits.
As some of you have found, Fortinet blocks a lot of sites, including this site and youtube and many other crucial websites, as well as torrent servers.
I have found that after a few minutes, NordVPN is able to find a protocol which bypasses Fortinet. BUT.. sometimes it does not! If it fails to bypass Fortinet, find your NordVPNSetup.exe file and run it. After reinstalling it, NordVPN is again able to bypass Fortinet after a few minutes.
I suspect that somehow NordVPN is disabled by Fortinet, but after reinstalling it, NordVPN's magic is again operational.