Upsell pop-up not working

Hi,
I enabled upsells on my site and added them on the Up-sells Page, however, the pop-up for the upsells is not showing when I add to cart.

Here are the settings:
https://i.imgur.com/3Zryoav.png
https://i.imgur.com/gpymKiQ.png
https://i.imgur.com/rcng1iK.png

Here is the link to one of the products: https://coachmarkcarroll.com/shop/bikini-4/

Please advise