Primary Menu and Menu Firstchild

Hello,

The menu system in Solo is complex because it uses special templates. I'm not sure if you've installed these modules or not. The website needs fixing. A good first step is to remove any modules that might be causing problems with the menu. You could also try using the basic Drupal theme, Olivero, to check if the menu still isn't working right.

If you figure out what's wrong and still want to use the menu modules, they should work with the standard Drupal menu templates. You'll need to disable Solo's menu library and make a new template to change the main menu and others.

Best wishes,
Alaa

The module Menu Firstchild does not work with this theme. I tried with the Tara theme and it works fine.
However, I found a solution that seems satisfactory to me: if I put # as the link, the secondary menus open normally without however sending you to a page. It's exactly what I needed: http://testns.gmpe.it/cms/

Thank you and greetings

Thank you for the update! I'm glad to hear that you found a workaround that works well with the menu.
Best wishes,
Alaa