Plesk Performance Booster displays the warning: Following permissions are not allowed in the subscription, or service plan: PHP version and handler management

• Navigate to Service Plans > service_plan_name > Permissions tab.
• Enable the option PHP version and handler management:
  
• Click on the Update & Sync button to apply changes for all the subscriptions under the selected service plan.

Note: Changes will not be applied for the Locked subscriptions

Warning: After applying changes on the subscription level, the subscription will be locked from the synchronization with its service plan

• Navigate to Subscriptions > example.com.
• On the right navigation pane click on the Customize link:
  
• Switch to the Permissions tab.
• Enable the PHP version and handler management permission:
  
• Click on the Update & Lock button to apply changes.

1. Connect to the server via SSH/RDP.
2. Additional step for Plesk on Windows: start a Command Prompt as Administrator.
3. To adjust permissions:

• On the Service Plan level:

  # plesk bin service_plan -u "Default Simple" -manage_php_version true

  Note: Change Default Simple in the command above with the name of the required service plan

  Note: Changes will not be applied for the Locked subscriptions

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• On the Subscription level:

  # plesk bin subscription_settings --update example.com -manage_php_version true

  Warning: After applying changes on the subscription level, the subscription will be locked from the synchronization with its service plan