Mobile Menu Broken

Hello,

I am having trouble with the mobile menu on my Highend WordPress site (maryland5star.us). When I updated the site to WordPress 5.6, the mobile menu stopped working. The menu is working as normal on desktop, but when you enter the site on a mobile device, the menu doesn’t open when you press the three-line, hamburger icon. The icon changes color, acknowledging it has been pushed, but the drop down menu does not appear. I updated all of my plug-ins and cleared the cache on the site and my browser to troubleshoot, but neither fixed the issue.

Please help! Thanks!