If your subscription payment fails to process, you will receive an email reminding you to fix the error and make the payment so that you and your clients don't lose access to your website. In order to fix this, here is what to do.
You can view your subscription and past payments through your CentralApp account. Go into your account settings under Plan and Billing and scroll down to view your invoices.
When the payment status is failed, a blue button will appear asking you to pay the failed payment. You can click this and input the information for the card you want to charge this invoice to.
You should also take this opportunity to double check the card details associated with the automatic subscription in your account. If the card has expired, do not forget to update the details with a valid card instead.
If your account reaches three unpaid invoices, your website will automatically go offline and you will risk losing access to your account.