Hello
When using the Validate by URI checker on https://validator.w3.org/ on a website on a fresh installation of Almalinux 8 + ApisCP I’m getting the following error
IO Error: HTTP resource not retrievable. The HTTP status from the remote server was: 400.https://site.tld/
If I move the website over to another setup, such as simple nginx or apache stack or put the site behind cloudflare the error goes away. I’m not finding any obvious cause for this and why it only happens if the site is on apiscp but goes away when proxied through cloudflare.