This error message means that you didn’t setup the quantity correctly. This can be due to the fact that you set the quantity to 0 or below the minimum amount allowed by your smm panel for this service or because you used an incorrect name for the attribute quantity.
How to fix:
1. check if your quantity is above the minimum quantity in your smm panel for this service
2. review the docs point “How can I add a service to a woocommerce order?”
