I encounter this error when trying to make a payment and I cannot make a payment. How can I fix?
Can you create a Billing ticket with my Support colleagues and share your ticket number here?
You can create a Billing ticket here
https://dash.cloudflare.com/?to=/:account/support
Prior to creating the ticket, you may want to ensure your credit card details are correct and up-to-date and if you continue to have problems, you may want to try adding PayPal as a payment method.