I am trying to install the Dynamics 365 Nonprofit Accelerator from AppsSource. I get through all of the steps without problems until I get to "Deploy" where I get the following message:

I have tried "Contact Support", but it just leads me in circles.
When I go to the Power Platform Admin Center/Resources/Dynamics365 Apps I get a list of apps, all of which are "enabled" except for the Nonprofit Accelerator, which is shown as "Not Configured".

How do I get the Nonprofit Accelerator to go from Not Configured" to Enabled"?
Thanks for any assistance.
Nick Farmer