The error message (Error: Error: The content of element type "Billing" must match "(ShipperAccountNumber,ShippingPaymentType,BillingAccountNumber?,DutyPaymentType?,DutyAccountNumber?)". at line 15, column 14) from DHL occurs because the ImportAccountNo account number has not been added.
To add the ImportAccountNo on Mintsoft, follow these steps:
Go to Connect then Courier Integrations.
Click DHL and find the connection affected.
Click on Actions, then Edit.
Fill in the ImportAccountNo field.
Click Update and retry the shipment.