I can't create a child account for my family
I am trying to add my son to the family account. I click on parental verification and it asks for my credit card, but there is nothing there... it is just blank. No place to type anything, no buttons to go forward and done is grayed out. What is wrong and what do I do? My son needs this because he is non-verbal and his AAC program is on the device.
iPad, iPadOS 15