Not Showing on Featured Images

Hi,
We have just installed the free plugin on our site and it looks good.
However, the Pin it button is not showing up on featured images. We tried to search on this forum and found this thread https://www.ads-software.com/support/topic/pin-it-hover-not-showing-up-on-featured-image-in-recipe/, we tried to add the css you’re saying as a solution but it doesn’t work. Can you take a look on this? Thank you!

html body .wpurp-container a.pinit-button.old_default span:not(.wpupg-show-on-hover) {
display: block !important;
}

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