Problems with menu creation

Are you using a Virtual Host on WAMP?

No, localhost running on my computer.

Try setting up a Virtual Host. It’s an option within WAMP.

Instead of your URL being https://localhost, it will be https://projectname

But then, I need to re-install again, as the previous installations was done on localhost, don’t I?

What do you need to re-install?

I need to ro-do all I’ve donde previously, as my previous site was built on ‘localhost’. After doing the changes you comment, all my previous WordPress configuration is obsolete, as all paths refer to some ‘localhost’ URL, i.e.: after doing your changes, I have my homepage on https://mysite, but the rest of sections remain as https://localhost/mysite/section
Then, I imagine I need to re-install WordPress from zero.
I would like to remain with localhost configuration, as in other projects I didn’t have this problem.

Okay, I hadn’t known that would be an issue. Sorry.