not working in category page

Hi all,
When the plugin is enable that’s what my page does (besides a weird css format):
http://elscampaners.cat/ajax-example.mp4

– It takes three times more to load than normal
– It doesn’t do the magic AJAX
– The only place it works is on product detail.

Absolutely any tip or help will be welcome. An example of the category page is:
http://elscampaners.cat/categoria-producte/verdures/

Thanks!

https://wordpress.org/plugins/woocommerce-ajax-add-to-cart-for-variable-products/