Problem with navigation menu mobile

Hello everyone :wave:

I’m having an issue with my menu on mobile devices. The navigation works until I close the menu and open it again, the submenu that I clicked on before closing the menu in the first place, won’t open anymore, is this a JS problem ?

Thank you for your help :slightly_smiling_face:

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

And the live site :