Github page shows created successfully, but error 404

I have created a Github page, as below,

But it always shows 404 error: There isn’t a GitHub Pages site here.

If you’re trying to publish one, read the full documentation to learn how to set up GitHub Pages for your repository, organization, or user account.

It has taken almost the whole afternoon, and I have also tried various methods, but failed. It was successful before.
Could you pls help with it? Thanks in advance.

The repo:

you don’t have the /docs folder because you are building it from there,

now, change that to /root

wait for it to show up, sometimes it will take more than a minute to build it,