Cannot add Apple Pay cards to Watch
I have a new iPhone 15 Pro Max and a new Apple Watch (model A982 Version 10.1 (21S67) but when I try and add my Apple Pay cards to my watch via the Watch App on my phone, I just get "Could Not Set Up Apple Pay - An error occurred while setting up Apple Pay".
I get this with both payment cards, and a different error when I try to add my BMW key when I get "Cannot Add Car Key - there was a problem adding this BMW key to Wallet".
All of this worked fine on my iPhone 12 and my previous Apple Watch.
All software is up to date.
iPhone 15 Pro Max