Hi Courtney,
There are two jQuery JavaScript files of different version are included and this results in JS error. Those two JS files are wp-includes/js/jquery/jquery.js?ver=1.12.4 & wp-content/themes/bandbay/js/jquery-2.1.4.min.js?ver=4.8.1
The JS file jquery-2.1.4.min.js is included via theme and it conflicts with the WordPress main jQuery file. The JS error breaks the rest of the things.
You should contact theme developer for support.
Let us know.
Kiran