Question
SSL/TLS certificate was installed on IP address, or Plesk was secured with a Let's Encrypt certificate.
While trying to reach the IP at https://203.0.113.2, or log into Plesk over https://203.0.113.2:8443, the following warning still appears:
Your connection is not secure
Why does it happen?
Answer
It is expected behavior. The SSL certificates are usually associated with the fully qualified domain name, not an IP address.
with