Our payment processor (wepay) is currently experiencing a major outage . Status updates can be found here: https://status.wepay.com/
I will reply here & update the Active Incident report on our Help Desk once wepay has resolved the issue.
My apologies for the inconvenience. If you experienced a failed checkout recently, don’t worry, it’s not something wrong with your card and you definitely don’t need to do this: