[Offtopic info for the author]

I see [1] you're using <frameset> to wrap GitHub Pages with your own domain. You could do it in a less hacky way by creating a CNAME file in GitHub repo, and updating GitHub repo settings + DNS settings of the domain:

https://help.github.com/en/github/working-with-github-pages/...

(Unless there's some particular way why you don't want it? I'd be curious. Ability to gather server-side logs?)

[1] learnt it because the page fails to load with uMatrix extension so I checked source.