DHL Parcel UK will not accept parcels with 0 weight, if you face this issue, please update the product weights to a minimum of: 0.5kg. You can do this in Shiptheory by viewing the shipment and editing the details:
or update the product weight in your sales channel and retry the order:
Please amend this and if you are still experiencing issues, please don't hesitate to contact Shiptheory at support@shiptheory.com or call us at 0117 403 4313