Javascript error with WooCommerce “Add to Cart” button

The link I gave is to a test website, so don’t worry about buying anything. You need to click the “Shop” link from there. (The first time you go there, you need to have ?cmp_bypass=oh-my! appended to the URL so you won’t see the “test website” splash page.)

We are using WooCommerce and a number of plugins. When I deactive CleanTalk everything works fine. With CleanTalk active, clicking the “Add to Cart” button on the Shop page often, though not always, results in this error message:
o[1].body.append is not a function

This only happens on the Shop page. If I go to one of the individual product pages and click that “Add to cart” button, I do not get the error. I suspect there is a JavaScript conflict only on the Shop page.

I disabled half the plugins and only when I disabled CleanTalk did the error stop happening. I will disable the other half if you need me to.

The page I need help with: [log in to see the link]