I am using a flexi SSL certificate to pass through traffic from http to https. It worked on 4 of my sites, but now one of them is suddenly failing - but the origin is clearly accessible.
Cloudflare reports err 521, but it seems to be incorrect. I have turned off the force SSL option to check:
Clearly, the non-encrypted origin is accessible, but for some reason cloudflare can’t connect. It worked up to this point. Nothing was changed on the server as far as I know, it just suddenly stopeed.
Is this an issue with cloudflare?