My site doesn’t appear to support a QUIC or HTTP/3 connection. What should I do?

Sites running on should support HTTP/3 connections. Use the HTTP/3 Check tool to see whether it’s supported on your site. If it is not, the most likely explanation is that your DNS configuration changes may not have fully propagated, or your DNS has been configured incorrectly. Verify your DNS is correct, and that it has fully propagated. If your site still does not support QUIC or HTTP/3, please submit a ticket for further assistance.