How To Fix WL021 - No implementation found for log '&'

SAP Error Message - Details

• Message type: E = Error

• Message class: WL - Workflow: run-time messages

• Message number: 021

• Message text: No implementation found for log '&'

What causes this issue?

Various protocols can be chosen for sending data in the Web activity.
However, no implementing class could be found for the protocol
currently chosen (number: &V1&).

System Response

The workflow system does not send any data.

How to fix this error?

Enter an appropriate implementation for the protocol.

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.