Still not working for me in France, either from home (Free ISP) or OVH datacenter.
Works on my work's VPN.
Works on ProtonVPN.
Noticed that it's not (at all) ready for ipv6 (
https://ipv6-test.com/validate.php )
EDIT: end of story, pi-hole or something didn't like some change somewhere on local network. Frankly I can't pinpoint a cause but at least I found working state from which to search.