Organisation Pages not published, but Settings says it is

I have an orgnaisation https://github.com/busytex and its pages site at https://github.com/busytex/busytex.github.io (built from main branch, has index.html). In settings it shows that Pages site is being built, but http_://busytex.github.io shows 404.

How do I set up this site?

I also have a repository http_://github.com/busytex/busytex, I wonder if it breaks anything.

Hmm. After recreating the repo, and changing the pages branch back and forth, it started working