So I have two github pages sites. My main itsmeow.github.io is served on https enforced itsmeow.dev and www.itsmeow.dev. I have another seperate site on a gh-pages branch which is served on https enforced betteranimalsplus.com. Everything works fine and HTTP www works fine, but HTTPS www gives a cert error. This is really weird because my DNS/settings are the same as on itsmeow.dev.

Here is my GH settings

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This is my DNS record for betteranimalsplus.com

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This is my cert error

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I’m not sure what I’m doing wrong, the only difference between these two is the CNAME for www on itsmeow.dev is “itsmeow.github.io.” but if I set that for betteranimalsplus.com the same issue persists

I have verified it’s not a DNS cache issue by flushing my cache and confirming the DNS changed by using dig. For both CNAMEs.