This error (An Error Occurred when attempting to: CreateShipment: {"StatusCode":200,"Error":"Invalid Value"} Error: The remote server returned an error: (400) Bad Request.) from Huxloe typically occurs due to a negative/ invalid order or product value.
To resolve this issue please review the steps below:
Ensure the Order Value is not negative.
Ensure the Product Value (Price, VAT and Discount) is not negative, for example the discount is higher than the price of the item.
Once corrected, retry generating the shipment.