Issue with Adding Payment Method

Hello,
I am trying to add a Mastercard to my PeoplePerHour account under the "Payment Methods" section, but I am encountering an issue. When I attempt to add the card, I receive a message saying, "You haven't used any payment method yet." I have double-checked the details of my card, and everything seems correct. However, the system does not seem to recognize the payment method.

I would appreciate any assistance in resolving this issue. Please let me know if there are any specific requirements or steps I need to follow to link my Mastercard successfully.

Thank you for your support.