Mobile menu doesn’t work

The hamburger menu in the mobile version of my website (Go template) doesn’t work. When clicking on the menu the entire screen will be covered by the menu. When clicking on any of the topics in the menu that are linked to a specific section on the home page the menu won’t disappear. This is not a problem when navigating to another site, only when the link is directed to a specific section of the home page.

Thankful for any help!

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