How to allocate application vault ?

Solution :

[1] Login to your Plesk control Panel
[2] Click on subscriptions
[3] Click on subscription name for which you want to allocate the application
[4] Click on customize
[5] Then in the permissions tab enable Access to Application Catalog
[6] Then in applications tab select Provide only applications that I select and then allocate the application
[6] Cick on ok