If the order payment fails, there could be several reasons - let's go over the recommended troubleshooting steps.
Click "Retry" next to the order - most likely, the payment will go through this time.
Check if a payment method has been added
Navigate to the "Payments" section of your Printify account to check if you've added a payment method or topped up your balance.
Check if there are enough funds available on the card (or in your Printify balance)
If you're positive that a card has been added to your Printify Account, or if you see that you have funds in your Printify balance, check whether there are enough funds available to cover the total cost of the order (product price plus shipping cost).
If so - go over this list for any other possible reasons for failure, or reach out to your bank for more information. In the meantime, you may want to try using an alternative card.