This element renders one cart button.
Please make sure that one common button for the products list is enabled in the configuration of the DJ-Catalog2.
At first, make sure that one cart button is enabled in configuration of DJ-Catalog2.
Go to Dj-Catalog2 Component - Options - Product list tab - Scroll to Cart button - Choose "One common button" and Save it.
Now go to your product template in builder adn add new additional element - one cart button.