The problem is in the tablet and the mobile version where I can’t open the navigation menu. I checked in the designer where the nav top opens but it’s completely transparent and I can’t see the nav links.
I can’t tell exactly what’s causing the issue without the read-only link as @Noah-R suggested, but it looks as if your nav menu’s display state is set to Display: None on the Tablet and Mobile breakpoints. When you set the Nav Menu’s display state to Block or Flex, it appears on the breakpoints you mentioned.