SSL Certificate not signed in Plesk

StingrayXD

Visiting the Plesk Admin Panel shows:

Your connection is not private
Attackers might be trying to steal your information from myhost.mydomain.com (for example, passwords, messages or credit cards).

I have to click Advanced and Proceed to myhostname.com:8443 (unsafe) to continue.

How can I resolve this? Do I have to get an SSL Certificate? :/

Kaptain

You can install a Let's Encrypt certificate for free.

Fill the form. Make sure the domain name field matches the FQDN hostname (myhost.mydomain.com). The email address is required to receive expiration notices.

If you don't have a proper FQDN hostname, it may not work. In this case, make sure it's working before trying to set up a Let's Encrypt certificate. Otherwise, you may have to wait until the DNS propagates before trying again.

Once the Let's Encrypt certificate is set up, return to the previous screen (SSL/TLS Certificate) and click at the [change] button next to the Certificate for securing Plesk.

Select the Let's Encrypt certificate (server pool) and press OK.

The certificate will be installed and working, but your browser may still show Not Secure for some time. You can confirm if the certificate is installed correctly by opening the Plesk Admin Panel using another browser.