Can't Unlock with stamper ☹️ – Crayola DigiTools 3-D Review

I downloaded this app to work with the Crayola DigiTools Ultra pack. There are three apps that work with the pack in total. The other two unlocked easily, but the 3-D app won't unlock. It's as if the app doesn't recognize the digital stamper. Please fix, Crayola. Then I will update rating.
Review by GarlixBlace on Crayola DigiTools 3-D.