SSL not working on domain and server

Alright, first time here and this forum and using hestiacp as well, so bare with me plz!
how to enable Lets encript ssl on the server host ip FQDN? ex: server.domainname.com:8083, i did enable on the domain section of hestia but still showing “Not secure connection”. thank you

Probaly chrome is showing you the cert as invalid due to his own cache. Please try to use incognito mode and also verify your ssl certificate on a external service like: https://www.sslshopper.com/ssl-checker.html or https://www.ssllabs.com/ssltest/