This error is due to the card owner's financial institution declining the authorization of funds. It's possible that the card is expired or not enough funds for payment. See I am getting a payment declined error when I click submit, what should I do?
Solution:
1. Delete your payment account and add a new payment account with the latest payment information. Click here to learn how to manage your payment accounts.
2. Contact your financial institution to assure that the funds are available for payment.