I’ve just purchased an ACM for my domain - and have all SSL elements set. But when I try to deploy my Github Pages, or try and view the domain I get the error above.
What steps have you taken to resolve the issue?
SSL Certificates updates
ACM purchased
Set Enforce HTTPS
SSL/TLS on Strict
Was the site working with SSL prior to adding it to Cloudflare?
Your network administrator has configured Cloudflare Zero Trust DNS policies which are blocking that domain. You will want to contact them to review their zero trust DNS logs to determine the reason the domain is block and if they choose to unblock it they can do so.