AMEX won’t add to new iPhone, but is still on Apple Watch
I have three cards on Apple Pay; two AMEX and one Apple card. All three are on my Apple Watch and MacBook and work fine. I got a new iPhone and it won’t let me add one of Amex cards. When I click the + button, it knows there should be that card in there because the last 4 digits show up, but it won’t add when I enter the four digit verification code. It just says ‘Could not add card’. Any ideas?
iPhone 12 Pro, iOS 14