Menu disappears on phone

Hi everyone,

I’m at a loss here. I did a website and the menu has disappeared on phones. It is responsive; I have use the exact same theme child as on another website which does work.

I have changed the font. At first the menu items were too small so I changed the font of the menu, resulting in the menu not appearing on phones (so no 3 dashes…).

I have checked:
– All plugins; doesn’t make a difference;
– all font/menu related css.

But I can’t make it work. Does anyone here have a clue..?

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