Required parameter &1 is missing in container (business process &2)

What causes this issue?

An obligatory parameter could not be supplied a value in the dataflow
of a front office process.

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?

Check the Customizing settings for the front office.

Error message extract from SAP system. Copyright SAP SE.