This has been resolved.

A fix has been implemented and we are monitoring the results. If your site was affected and is still experiencing difficulties, please contact our support team via chat in MyKinsta, or by emailing support@kinsta.com.

We have identified the cause of the issue, and we are currently working on a fix.

Our Engineers are investigating reports of a service disruption affecting sites in the Northern Virginia (US East 4) data center. We are working to restore service to affected sites as quickly as possible.