Hi Sabrina, sorry to hear things broke for you since the last update. Is this a Woocommerce site? Is the quick view link specific to your theme?
It looks like FancyBox is activating itself on the quick view buttons while it should not. Did you do something to prevent FancyBox from activating itself on that button before or has this just started happening?
It might be helpful if you can share a link to your site. You can use the contact form if you wish to keep it off the forum page.