DNS one domain works / the other domain => no more

I had it working and now its doesn’t?!
I have two domains pointing at my homeadress.
My domainnames at my provider point to the same and correct Cloudflare DNS server.

Primary nameserver [dayana.ns.cloudflare.com]
Secundary nameserver [etienne.ns.cloudflare.com]

My DNS setup at Cloudflare is basic and identical.

They worked both at one time.
I don;t know what happened but now.

One domain still works, and the other domain gets an error:

Check your DNS Settings. A 523 error means that Cloudflare could not reach your host web server. The most common cause is that your DNS settings are incorrect. [highly unlikely] Please contact your hosting provider to confirm your origin IP and then make sure the correct IP is listed for your A record in your Cloudflare DNS [checked]

I tried everything and checked for hours now, I just can’t find the problem.
Do you have suggestions that may help? Maybe a checklist to go through? A way to remove the domain and set it up again? Anything…

This topic was automatically closed 15 days after the last reply. New replies are no longer allowed.