GitHub Pages: InvalidDNSError for repriza2.ro although DNS is correct

[ambroziandreea]

🏷️ Discussion Type

Question

💬 Feature/Topic Area

Pages

Body

What I'm trying to do
Use the custom domain repriza2.ro (with www.repriza2.ro as alternate name) for my GitHub Pages site.

• Repository: ambroziandreea/ambroziandreea.github.io
• CNAME file in the repo contains: repriza2.ro

What happens instead
Settings → Pages shows: "Both repriza2.ro and its alternate name are improperly configured. Domain's DNS record could not be retrieved (InvalidDNSError)". The TLS certificate is stuck at "1 of 3, Certificate Requested", so I can't enable Enforce HTTPS.

DNS setup (Cloudflare, all records DNS only, not proxied)

• A repriza2.ro → 185.199.108.153, 185.199.109.153, 185.199.110.153, 185.199.111.153
• CNAME www → ambroziandreea.github.io
• No AAAA records, no CAA records, DNSSEC not enabled

I moved the nameservers at the registrar to haley.ns.cloudflare.com and major.ns.cloudflare.com on September 29, 2026, around 10:05 UTC. Before that, the registrar's nameservers had no records for the domain.

Public resolvers (Google DNS) return the correct A records and CNAME, and the site already opens on http://repriza2.ro.

What I already tried

• "Check again" several times over more than 20 hours
• Removed the custom domain and added it again

Has anyone seen this before, especially with .ro domains or after moving nameservers to Cloudflare? Any idea what else I could check?

Thank you!

[kurupdevs]

I checked repriza2.ro against public DNS and it currently returns no A or CNAME records at all, so the InvalidDNSError is actually the expected result rather than a GitHub bug. For an apex domain, you need A records on the four GitHub Pages IPs (185.199.108.153, 185.199.109.153, 185.199.110.153 and 185.199.111.153), and www should be a CNAME to ambroziandreea.github.io. Also check with your registrar that no redirect or parked-page setup is sitting in front of the DNS, since that fails the check too. Once the records actually resolve, GitHub needs some time to re-run its DNS check before you can enforce HTTPS.

[ambroziandreea]

Thanks for checking! Strange, from my side Google DNS (dns.google) returns the 4 A records (185.199.108-111.153) and the www CNAME to ambroziandreea.github.io, answered directly by Cloudflare's nameservers. Which resolver did you use? I changed the nameservers from the registrar to Cloudflare about 24 hours ago, so maybe some resolvers still have the old delegation cached. That would also explain why the GitHub check fails.

[ambroziandreea]

https://dnschecker.org/#A/repriza2.ro

[ambroziandreea]

Solved. It was DNS propagation after the nameserver change: the DNS check turned green about 24 hours after I moved the nameservers to Cloudflare, and the certificate was issued right after. Thanks!