Quickview Shopping Cart Error

Hi Guys,
New to WordPress and without the skill of programming im stuck with how to fix the quickview part of my site.
The quick view opens correctly, however, when clicking add to cart all disappears except the return value of 0.
Youve made great contributions to the WordPress community and hope to have this resolved so i can upgrade some of the packages to premium.
Thanks for your time looking into my dilemma – Andy from Australia

Site is https://www.kickstartcomputers.com.au

https://wordpress.org/plugins/yith-woocommerce-quick-view/