Err_cert_authority_invalid

[calculatorrowing]

I also ran into this problem yesterday, when running a tool that does not use http unless an https request first fails to connect. I was surprised to find that disabling "Enforce HTTPS" didn't actually disable https, and that Pages would still try to send a github certificate. It doesn't seem that there's anything a user can do if they don't need or want https for their site, which seems like a bug.