Hi there,
I had a look at your website, and it appears that the problem may be due to duplicate versions of the jQuery library on your page. If you look at the source code of your website, you’ll see that both version 1.10.4 (from code.jquery.com) and version 1.12.4 (from your WordPress installation) are being loaded. Since the issue persisted after deactivating most of your plugins, my guess is that the older copy of jQuery is being loaded by your theme. Unfortunately, that means you’ll need to edit the theme to remove the code that loads the old jQuery, or (preferably) contact the theme’s developer once you’ve confirmed that it is indeed the theme loading it (and tested to ensure that our plugin works when the old jQuery is removed).