WP Guardian error on a Plesk server: To start using this function, you must activate it in the corresponding service plans or subscriptions.

Symptoms

• After purchasing WP Guardian, none of the features can be used with the following error:

  To start using this function, you must activate it in the corresponding service plans or subscriptions.

Cause

The permission "WordPress Websites with Vulnerability Protection" on the service plan and/or subscription is set to 0 or a less than required for the subscription or service plan.

Resolution

Check the subscription and service plan of the respective website and either increase the permission or set to Unlimited:

• Managing Subscriptions | Plesk Obsidian documentation
• Setting Up Hosting Plans | Plesk Obsidian documentation

If the subscription is locked and it needs to be synced with the service plan:

• How to synchronize locked subscriptions with their service plans