It seems like you're encountering an issue with the Plesk Performance Booster, specifically related to permissions for managing PHP versions and handlers within a subscription or service plan.

This warning indicates that the current subscription or service plan settings in Plesk do not allow for the management of PHP versions and handlers. This could be due to restrictions set by the server administrator or within the service plan itself.

To resolve this issue, you have a few options:

1. Contact the Server Administrator or Hosting Provider: If you're not the server administrator, you should reach out to them or your hosting provider. They may need to adjust the permissions or service plan settings to allow for PHP version and handler management.

2. Check Service Plan Settings: If you have the necessary permissions, review the service plan settings in Plesk. Ensure that the option to manage PHP versions and handlers is enabled.

3. Upgrade Service Plan: If you're using a limited service plan, consider upgrading to a plan that includes a PHP version and handler management.

4. Customize Permissions: If you're the server administrator, you can customize permissions for subscriptions. Make sure that the necessary permissions for PHP version and handler management are granted.

5. Verify PHP Component Installation: Ensure that the PHP components required for PHP version and handler management are properly installed on the server.

Remember to always exercise caution when making changes to server settings, especially if you're not familiar with the implications of those changes. If you're unsure, it's best to consult with your hosting provider or a server administrator.