Burger menu not displaying anything in mobile view

Hi there,

I’m working on a template and I might have misused / deleted a part and now the burger menu is no longer showing anything in mobile view.

Can you help me with that?

Here is my site Read-Only: [LINK][1]

It may be a good time to use Site Settings > Backups

Yes I looked into it and I saw what version was the turning point but I was not able to identify what setting was changed…