You seem to have a lot of custom CSS going on - please remove that first and see if that solves your problem. It looks like you’re blanket hiding your content, but not putting it back in:
OK I removed that CSS (it was for my previous custom-coded megamenu) and that helped. Still needed to do a lot of custom tweaking to get it to work—manly because Bricks disabled position: relative (a totally bonkers decision IMO) a while ago so I have a custom rule that re-enables it an all DIVs, so I had to manually set menu parent elements to static. Eventually I got it to work.