Please tell me how to install Plesk updates
1. In Plesk, go to Tools&Settings and click Updates & Upgrades.
2. On the Updates and Upgrades page, click Update Components do.
3. Click continue to start the update process.
Additional information: By default, Plesk automatically installs updates through the Plesk daily task (run every night) if the option to automatically install Plesk updates is enabled in Tools&Settings > System Updates > Settings.