"AuthorizationManager check failed.." error when installing ActiveRoles Add-on Manager (145898)

When installing ActiveRoles Add-on Manager, the following error is encountered:

Add-on Manager encountered an error when performing the following operation: Register Add-on Manager.
The following error occurred while loading the extended type data file: Microsoft.PowerShell, C:\Program Files\Quest Software\Management Shell for AD\Quest.ActiveRoles.ADManagement.Types.ps1xml : File skipped because of the following validation exception: AuthorizationManager check failed.. 

In an elevated PowerShell, use the following command to set the execution policy to either 'RemoteSigned' or 'Unrestricted':

Set-ExecutionPolicy RemoteSigned
-OR-
Set-ExecutionPolicy Unrestricted

Once set, re-run the installation.