Thanks a lot.
I figured it out myself.
The problem was incorrect installation of security certificates and WP configuration
The settings were http:// instead of https://
The update process is starting. This process may take a while on some hosts, so please be patient.
Enabling Maintenance mode…
Updating Theme Rife Pro (1/1)
Downloading update from http://rifetheme.com/download/rife-auto-update/?wpdmdl=9&master…