If you're trying to pay with credit card and you get an error it is because your credit card
was declined by your issuing bank for a variety of reasons and the payment was not processed.
The most common reason for a card decline is an invalid Postal Code check.
If this check fails, it's because the bank is telling the credit card processor's system that the information the cardholder
has provided does not match what they have on file. If you have
recently moved, it may take your bank a while to have the correct zip code on file.
While some banks decline payments that fail this check, others do not. If your ZIP code information is correct
and you're still experiencing issues because of this check is failing, you may wish to call
your bank and confirm that the information
your bank has on file is correct.
Alternatively, you can try to pay with PayPal if you have a PayPal account.