Directory Tree Problem with config.yml and menu.yml - how to fix?

You stated that hugo server generates the wrong URL:

Then you implied that hugo server generates the correct URL:

Which of the above is true?

It would be helpful if you were to share your project repository with us.

See https://discourse.gohugo.io/t/requesting-help/9132.

Let us see your code

Include a link to the source code repository of your project, because we really need the context of seeing your templates and partials to be able to help you. It is trivial to do a quick git clone on your repo, then run hugo server in your project, to help you out. On the other hand, recreating your code from screenshots, or sort of guessing at it, is not.

If you can’t share your repository for whatever reason, consider creating a dummy repo that you can share, which reproduces the problem you’re experiencing.