I'm trying to enable Apple Pay capability for the app I'm developing. Following Apple's instructions I'm using Keychain Access to create a Certificate Signing Request. I entered my email address, made up a unique Common Name, clicked "Save to Disk" and "Let me specify key pair information" and then selected ECC and 256 bits. Then I get an error message:
"Incorrect CSR Key Pair Expected a Key Pair with ECC Algorithm and key size of 256 bits. Create a new CSR and try again."
I've done this four times, same error message. What's wrong? I'm using Big Sur 11.6.2 on my 2014 MacBook Pro.