Hello everyone, I have an existing production Ubuntu server hosting multiple websites that have successfully renewed Let's Encrypt certificates for well over a year. As of July 1, all certificate renewals suddenly began failing, causing every website on the server to go offline. The sites have now been down for approximately 72 hours. I have never relied on automatic renewals. I have always manually executed Certbot renewals every 30–45 days, and they have always completed successfully until n...