Custom domain with subdomain with Vercel


I’m trying to get my custom domain to work with Render. Unfortunately I am getting a “Certificate Error”.

  • I’m using with Vercel and with Render.
  • Domain is hosted with Namecheap
  • I’ve set up a CNAME record in Vercel’s dashboard pointing to

Any thoughts on what I could be doing wrong?


Hi Amos,

Thanks for reaching out.

It appears the domain has a CAA records limiting certificate issuance to Let’s Encrypt:

$ dig CAA +short
0 issue ""

You’ll need to also add permission for DigiCert as covered in the Custom Domain documentation.

Hope that helps