When buying tickets online, we recommend choosing e-tickets rather than collecting tickets in person. This is because your physical numberless card has different details to the card details you see in the app – so, a ticket machine won't recognise your numberless card as the card used to buy the tickets.
If you choose to collect tickets from a machine, you may need to use your booking reference instead of a card number. You'll usually find this in the booking confirmation email from the company. Or you can try showing your in-app card details at a kiosk.