This error indicates the payment account type you have selected for the filing is not permitted due to a service contact being selected for Mail Service in the draft.
Solution:
Select a different payment account type other than a Waiver to proceed with mail/certified mail service.
If not needing to have service by mail/certified mail completed for any contacts in the case, return to the service page of your draft, click on each contact selected for service, and change any service method(s) selected for mail/certified mail service to service electronically or deselect the contact for service.
Please Note: If your court requires service by mail, please consult with your court for instructions on how to proceed.