Unicons theme: menu disappears

Hi!

I’m creating a website with a localhost (so cannot provide a link to the website as it’s not published) and I’m using Unicons theme. Everyhting else is working ok but the menu disappears when I srink my screen. The theme should be mobile friendly but I don’t get why the menu disappears. The images and texts look alright.

I would really appreciate if someone could help as I’m really lost and if the only option is to change the theme 🙁