I'm aware of the Sep 30 LetsEncrypt cert expiration and have made the necessary changes to CentOS ca-certificates.
This has fixed SSL/TLS on the mail server and php.
I'm now still getting an error with my Goaccess web stats service which provides live stats over an SSL web socket.
WebSocket network error: OSStatus Error -9807: Invalid certificate chain
Any ideas how to solve this issue ? It connects ok in Firefox but gives this error in Safari.