This output has not been defined for medium &1 and partner function &2

What causes this issue?

The current output type has not been assigned the partner function &v2&
for the medium &v1&.

System Response

The output type cannot be used with this combination of transmission
medium and partner function.

How to fix this error?

Enter the required combination in Customizing for the output type.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.