Mobile Menu not visible

Good morning,

I have an issue with a website I’m working on.
I just got this website to maintain so pretty new to it.
While looking at the design and everything, I saw that on mobile, the menu was not displayed.

Here is the link:

Would you have any idea of what to do to make it works?
Is it the theme or Beaver?

Thank you very much in advance for your help.


Did you resolve this? The menu is present on mobile for me.