Animations disabled, causing mobile menus and toggles to stop working

Hello!

I'm reaching a point of desperation. I've just spent a solid month re-designing my website, with the goal of simplifying navigation and making it cleaner on mobile, and I finally reached a point where I was happy with it! But then everything just broke, and I don't know why, and I'm seriously about to break into tears because I want so badly for this project to be done.

Here is the website: www.senseandcolor.com

I had it all good, and had tested it multiple times on desktop, tablet, and mobile., Everything worked. Then I added a lightbox code widget to one of the pages (www.senseandcolor.com/book-now/), and suddenly the mobile hamburger menu on that page stopped working. Note it was ONLY on that page! I was still able to navigate the rest of the site on mobile just fine, so I told myself I'd log in today to remove that code and try to find another way to get the form in there. But when I went to it today on mobile, none of the menus work. Or the toggles. Or the CTAs on the instrument pages that had a slight bounce when you loaded them. Every animation is broken. I've removed anything that's lightbox at all. I've disabled plugins. I've reinstalled Divi. I've removed the book-now page entirely, then added it back in when that didn't help anything. I've changed the "Get Started" button to go directly to the third-party hosted form, rather than trying to embed it on my site at all. I've double-checked the global header and can find nothing amiss.

I just don't understand what could have broken it so thoroughly and so suddenly, in a way that started small, then spread to other pages without me updating anything else. If anyone can help me, I'd be so grateful. I've sacrificed so much time with my family this fall to try to improve my business, and if I can't figure this out, I feel like I'm going to lose my holidays too.