No partner or payment card available

What causes this issue?

No partner is available, or a partner is available, but not payment
card has been selected for this partner.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Select a partner. Choose a payment card for the partner.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.