Quick view popup window plus and minus button not working

Hi,
i have using the free version of the quick view plug-in and i could see that the “plus and minus” button for the product quantity on the quick view popup window not working properly.

You can see the “cart icon” for each product https://taniaanne.com/all-meals/. Please check it and let me know your comments.

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