Does it works when calling product via shortcode?

In my case I’m calling some products by sku via wc shortcode to a specific page, and this plugin simply not works. I did some customizations, but just in css; all the hierarchy, classes, ids, were maintained. Some suggestion about what could be wrong with it?

https://www.ads-software.com/plugins/woocommerce-ajax-add-to-cart-for-variable-products/