Vercel custom domain SSL failure with ERR_CERT_COMMON_NAME_INVALID on Hobby plan

Discussions
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1

Hi Vercel community,

Problem

I’m having trouble getting my custom domain working on a Hobby project. The site deploys fine on the Vercel preview URL, but on my custom domain I get:

Your connection is not private
net::ERR_CERT_COMMON_NAME_INVALID

DNS Configuration

DNS is set correctly at my registrar (Host Africa):

  • @ A 76.76.21.21 (TTL 300)
  • www CNAME cname.vercel-dns.com (TTL 300)

Current Status

  • nslookup zamaluthuli.co.za using 8.8.8.8 returns 76.76.21.21
  • dnschecker.org shows 76.76.21.21 in most locations (including South Africa)
  • Vercel Domains tab still shows “Invalid Configuration” for both zamaluthuli.co.za and www.zamaluthuli.co.za.
  • Vercel support confirmed there’s no zone-level Cloudflare proxy at Host Africa, but the issue persists.

The site has been stuck like this since yesterday (Feb 26). Has anyone faced this on Hobby plan? How to force SSL issuance without upgrading to Pro?

Thanks in advance for any tips or workarounds!

Martyn

5

Hi Martyn,

Please update the DNS record so our system can issue the SSL certificate: https://vercel.com/martyns-projects-57fe60c9/zamaluthuli-attorneys/settings/domains. The domain is not currently serving through the Vercel Edge Network.