Originally Posted by
BeantownFlyer
Seems like a good guess, but I just tried this on 4 different reservations and where the QR code would be it just says "paper ticket required".
Did you buy those tickets with a voucher or some other way than just your credit card online?
I only ask that because I have a QR code for some of my reservations, but the one reservation that I bought with a voucher has the same thing where it says "paper ticket required" in the app where the QR code is for my other e-tickets.