How do I get a custom URL on GitHub Pages

Question

I've been having some issues trying to get a custom URL. I keep getting this error message about a "DNS Error".

Answer 1

https://docs.github.com/en/pages/configuring-a-custom-domain-for-your-github-pages-site/managing-a-custom-domain-for-your-github-pages-site#configuring-a-subdomain