You do not have WP Toolkit Deluxe available in any of your packages. Check the contents of your feature lists and enable WP Toolkit Deluxe to make it available to your customers.

Symptoms

When visiting the WP-toolkit interface, the following error is shown:

You do not have WP Toolkit Deluxe available in any of your packages. Check the 
contents of your feature lists and enable WP Toolkit Deluxe to make it 
available to your customers.

Description 

This error will occur when your selected feature list does not have both the wp-toolkit-deluxe and wp-toolkit options enabled.

Workaround

You will need to make sure that both are selected on the new feature list that the account utilizing WP Toolkit Deluxe is on:

* This should not be performed on the default feature list as it will cause issues if you have more accounts then the number of wp-toolkit deluxe licenses available. The exact steps can be read at the documentation below:

WP Toolkit (cPanel Docs)