Hey there…
3.2.12 Removes the “X” close indicator from the lightbox. Was this intentional?
We had updated Magnific-Popup lib in 3.2.12. “Close” button is there with color code “#333” and hence it can’t be viewed properly. Override that CSS code and it will be visible.
Use this CSS code in your theme’s style.css
#buddypress .mfp-close {
color: #FFF;
}