The following error is displayed when accessing Plesk Panel in the browser:
An error occurred during a connection to 10.10.10.10:8443. Peer's Certificate has been revoked. (Error code: sec_error_revoked_certificate)
SSL certificate which is used to secure the Panel was revoked and is no longer valid.
Login to the Plesk Panel using http port:
Go to Tools & Settings > SSL Certificates and install a valid SSL certificate.
In the list of certificates, tick the check box near the certificate and click "Secure the Panel".