Mobile Menu problems - burger menu won't open

Hi Guys,

I have no idea why, but the burger menu on a project I’m working on for a friend has all of a sudden stopped working. I have no idea how or what I’ve possibly done to break it!

When I click the burger menu icon on mobile view, the menu just won’t open… yet it did open last week when I working on the project. Read-only link is below. Any help would be greatly appreciated!

Here is my site Read-Only: https://preview.webflow.com/preview/brow-boss-new-site?utm_medium=preview_link&utm_source=dashboard&utm_content=brow-boss-new-site&preview=ae29429c28853a7435b7169022c24312&mode=preview