Since yesterday, there are some issues with sockets WSS when using letsecrypt certificates
(This happens on Mac only with SAFARI and Chrome: Firefox is fine)
All my certificates are valid (they have been renewed) and works fine on PC.
When I switch to a certificate with cloudflare (or some other generated certifs created by PLESK), everything is fine.
Error is ; Websocket connection to wss://... failed on Chrome and on Safari I got
OSStatus Error -9807 Invalid certificate chain
Once again, this error appeared from yesterday (on 5 different servers) and Only on Mac (!)
and when I change to another certificate (not generated by letsencrypt, everything is fine)
I use this (in nodejs)
key: "/etc/letsencrypt/live/mysite.com/privkey.pem" cert: "/etc/letsencrypt/live/mysite.com/cert.pem"