Electronic submission of PO Failed with A valid order contact email has not been supplied

Getting an error when Printing an EProcurement Purchase Order that would electronically send to the vendor:

 Electronic submission of PO XXXX/XXXXXXXX to vendor XXXX failed with a status of 500. A valid order contact email has not been supplied. 

• Munis EERP

• Purchasing

• E-procurement

Ship To/Bill to set up

On the Purchase Order, for the Ship To selected, the E-mail field was not defined or was invalid. Placing a valid email on the PO Ship to area fixes the issue.