I wrote to my theme support to tell them that my navigation on my desktop and mobile is not working properly or at all. They checked and said its a WordPress problem, not their theme. Here is what they wrote to me.
You need to recheck with your site admin or whoever set up your site or install WordPress to your site. This seems to be incomplete WordPress installation. Without jQuery, you site will never be complete in functionality. Since this is WordPress installation problem, there is nothing more I can do to help, I can only identify you that the problem is lacking of jQuery. Here’s the information of jQuery https://jquery.com/
The page I need help with: [log in to see the link]