Screenshot images are broken on this app!!!! – Prêt-à-Template Review

I’m an aspiring fashion designer, and I used to make my designs from my screenshot of pictures that I was inspired by. Now I CAN NOT DO THAT. After the iOS 11 update screenshot images do not show, they appear as BLACK BOXES. PLEASE FIX THIS.
Review by Smd temple run on Prêt-à-Template.