I have two websites set up from a template (both run on the same template, they differ in graphics and colors) for EU projects. The main menu on the site and subsites in computer browsers works correctly. On mobile devices it correctly collapses to an icon with 3 bars, however, when you click on it, the menu does not expand.
The assignment is to fix the menu on the existing site so that it is functional on mobile devices.
I am only interested in repairing my pages, no other whole sites. Only repairing what is there.