Why a Secure Website Can Still Show Connection Errors
https://thewebwatch.inkharbory.com/posts/why-a-secure-website-can-still-show-connection-errors
Even a secure website with HTTPS can show connection errors if its SSL certificate has expired or is misconfigured. Other culprits include browser caching issues or server-side problems with security protocols—like a mismatch in TLS versions—that disrupt the handshake. So, a lock icon doesn’t always guarantee flawless access.