'&' is not an SAP Business Workflow task

What causes this issue?

The ID entered is not the name of an SAP Business Workflow task as
stated in the selection.

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?

Please enter a valid SAP Business Workflow task or choose another
processing type.

Error message extract from SAP system. Copyright SAP SE.