Error during In-App Provisioning (eligibility step, PKErrorHTTPResponseStatusCodeKey=500)

We are implementing in-app provisioning in our fintech app; We are reaching out to ask for your help in understanding what is going wrong so we can fix it.

What happens:

User taps “Add to Apple Wallet” → we present PKAddPaymentPassViewController → they tap Next → after a few seconds the flow fails with "Set Up Later" alert.

Device log:

    "eligibility request failure",
    "Received HTTP 500"
)'; underlyingError: 'Error Domain=PKPaymentWebServiceErrorDomain Code=0 "Unexpected error." UserInfo={PKErrorHTTPResponseStatusCodeKey=500, NSLocalizedDescription=Unexpected error.}'; userInfo: '{
    PKErrorHTTPResponseStatusCodeKey = 500;
}'; >

Feedback Assistant ID: FB22176928 (In-App Provisioning issue 500 Internal Server Error)