Mobile Menu not Working

*Sorry, wrong Theme Forum*

Hey,
a Friend of mine asked me if i could help him with his family site. The tips i found on different sources didnt resolve the problem.
The mobile Menu ist not working, it dosnt show up on click but there ist someting going on -> because after the click on the Hamburger, the Hover-Effect on the Hamburger toggle vanishes.
There is no Custom CSS Code implemented and i cant find a problem in the CSS Files.

Theme: Flatter

Thanks for any help with this Issue.

Regards Michael

• This topic was modified 5 years ago by poolky.

The page I need help with: [log in to see the link]