Issuer C=US, O=Let's Encrypt, CN=R3
Not Before Feb 18 04:36:33 2024 GMT
Not After May 18 04:36:32 2024 GMT
Subject CN=mydomain.com
DNS mydomain.com, DNS:www.mydomain.com
Issuer C=US, O=Internet Security Research Group, CN=ISRG Root X1
Not Before Sep 4 00:00:00 2020 GMT
Not After Sep 15 16:00:00 2025 GMT
Subject C=US, O=Let's Encrypt, CN=R3
Let’s say that you already have the right certificate for cphestia.mydomain.com so you just need to update the certificate used by your host, I will use the user admin in this example but you should use the user name where cphestia.mydomain.com is in your Hestia conf
One more thing, does the cronjob you mentioned updates all the expiring soon certificates of all the hestia users and domains (including mail certificates)?
When you give a name to a server, you give it as a short name, in this case, hestiacp and a fqdn (fully qualified domain name), in this case cphestia.mydomain.com and sometimes you will try to connect directly to the short name so to be able to resolve it, you should add it to /etc/hosts file.