Issue
When running Document Package using a DocuSign delivery option, an error of "The sender username is not properly configured to send documents to DocuSign." occurs
Resolution
Go into the User Detail of the user experiencing the issue
Find the DSProSFUsername field (if it is not there, Edit Layout and add the field to the layout)
Confirm that the user's DocuSign username is listed.
Add if necessary.
Find the DSProSFUsername field (if it is not there, Edit Layout and add the field to the layout)
Confirm that the user's DocuSign username is listed.
Add if necessary.