Mobile menu weird error

Hey guys, I know my theme is not updated for a while, I've taken over the support of the site on behalf of a client. My question is, the mobile menu all links redirect to the front page on a mobile device, men when I inspect the code the links are korrekt in the code. Can you please confirm, is this a known error, is there a simple fix? Or is this a update issue? https://hovedstadens.dk/