The error (Web Request Error: An XML Error occurred! - Error in parsing request XML: The content of element type "DG" must match "(DG_ContentID,DG_LabelDesc?,DG_NetWeight?,DG_UOM?,DG_UNCode?)") from DHL typically occurs due to one or more products on the order missing a weight value. To resolve this issue please review the steps below:
Ensure that each product has a valid Weight assigned in the system.
Update any products that have a missing or zero weight value.
By following these steps, you should be able to resolve the error.