Error code : 21916260
“Invalid Shipping Service Cost, Postage service cost exceeds £7.50 maximum allowed for selected category.”
*£7.50 is an example
When given this error message, you must adjust your PrestaShop Shipping options to allow for the listed maximum. Usually this will have to do with “Out of Range shipping,” which will make the shipping cost higher. See the “Shipping” tab in your PrestaShop menu, and make the proper adjustments.