Let me share some reasons why you can't pay your subscription.
One possible reason is that what you entered doesn't match the bank records. This includes the name of the card, expiration date, and billing address. If you're unsure, you'll want to reach out to the bank to verify.
Another possible reason is that your card has restrictions. Some banks have an option to disable the use of the card for online transactions. Reach to the bank so they can enable it.
If the same thing happens, you'll want to perform some troubleshooting steps. Start by using an incognito window and renew your subscription from there.