How to update Plesk Obsidian to the latest build?
Go to Tools & Settings and click Updates.
Note: Plesk Installer uses port 8447. If this port is filtered by a firewall and cannot be opened for some reason, refer to the command-line instructions.
On the Updates page, click Install or Upgrade Product:
Click Continue to begin the update procedure.
During the update operation:
Plesk may not be accessible for several minutes
Websites will stay online