You’ll find that with any major VPN. The IP addresses they use to proxy your traffic eventually get flagged and blocked by lots of major players. Which is why VPN companies cycle through them quite often. As others have said, you’ll either need to switch servers (and thus ips) or figure out another path.
I don’t use mull but most have a way to exclude a given url or site from the tunnel if you need it. i.e. the site will work for you but it’s coming from your own IP and unencrypted.
*years? Yes. It used to be the bleeding edge of search and now it’s just profit driven enshittification like the rest of ai-ridden garbage tech wallstreet bullshit.