SSL Certificate Error on www subdomain - NET::ERR_CERT_COMMON_NAME_INVALID

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1

  • Domain: urhb.in and www.urhb.in

  • Error: NET::ERR_CERT_COMMON_NAME_INVALID

  • Issue: SSL certificate being served only covers urhb.in, missing www.urhb.in as a SAN — despite Vercel dashboard showing valid SSL for both

  • Debug output: Attach your Gist link

  • DNS: Cloudflare (DNS-only mode, no proxy)

2

The domain troubleshooting guide can help with most custom domain configuration issues. You might be able to use that guide to solve it before a human is available to help you. Then you can come back here and share the answer for bonus points.

You can also use v0 to narrow down the possibilities.

3

Profile - rohitnirban - Vercel Community Looks like the www subdomain is still serving an old SSL certificate.

Try:

Usually this regenerates the certificate with both:

included :+1:

4

Tried this multiple times but it still gives the same error.

Also, Its not regenerating the certificate beacuse as i removed them and added them again they simple says valid configuration no Generating SSL certificate

5

yes honestly if the main domain works fine and only the www subdomain has the SSL error, then it’s usually NOT coming from your app code/VS Code source itself :+1:

NET::ERR_CERT_COMMON_NAME_INVALID is more about:

  • SSL certificates
  • DNS
  • domain configuration
  • proxy/CDN cache
  • certificate sync/propagation

Your app code normally wouldn’t cause a browser certificate mismatch error like that.

Especially since Vercel already shows the deployment working and SSL valid in dashboard, it sounds more infrastructure/domain-side than application-side :sweat_smile: