Plesk can not be updated or is not accessible: Class Laminas\ServiceManager

[senthil]

Symptoms

• Plesk update fails or Plesk panel cannot be accessed with the following message:
  
  PHP Fatal error: Class Laminas\ServiceManager\ServiceLocatorInterface cannot implement
  previously implemented interface Psr\Container\ContainerInterface in
  /opt/psa/admin/plib/modules/monitoring/vendor/laminas/laminas
  servicemanager/src/ServiceLocatorInterface.php on line 18

Cause
The outdated version of the Monitoring extension is installed on the server.

Resolution

• Connect to the server via SSH/RDP.
• Update the Monitoring extension to the latest version with the command below in the SSH console
  or CMD/Windows Powershell:
  
  Code Select Expand
  #plesk bin extension --upgrade monitoring