Invoice products must be specified and must contain at least one element, RC: 400
This error occurs when you trying to save BULK invoices and in the order list is at least one Fulfilled order - it already has a shipping label saved.
To save BULK invoices in this case, you must check the option: Include already fulfilled order lines.
Feel free to contact us if you need any further information:
Chat: click on the blue chat icon (bottom-right)
E-mail: support@xconnector.app
Phone: +4 0373 747 991
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