My subdomain works with http but not with https.
I’m getting the following error message:

My subdomain works with http but not with https.
I’m getting the following error message:

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.
https://vercel.com/docs/projects/domains/troubleshooting
You can also use v0 to narrow down the possibilities.