Hamburger menu not working on mobile


I have a problem with the hamburger menu on mobile. It doesn’t show my menu in portrait mobile mode, only the research tool. But… it somehow appears in landscape mode! I do not understand.

I also have no issues with the menu on desktop. Only issue is in portrait mobile mode. Any idea why?

I’ve updated all my plugins as well as the theme. My website is:

Thanks in advance!

Hey there

This css can fix your problem:

.nav-open .navbar-collapse, .nav-open #menu {
display: block !important;

It works! Thank you very much, sir!