Mobile menu disapears

Helo everybody,
I’m testing this plugin and I’m getting quite good results on increasing speed.
There is one problem that I don’t know how to handle.
When I combine css and js, I lose my main menu (only on mobile) and in the best case the menu deploy doesn’t work as expected.
I’m using genesis framework with genesis customizer as child theme.

Any help with that will be more than welcome.

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