After following the steps in Configure Azure Active Directory App Registration , you receive the error message below:
System.AggregateException: One or more errors occurred. ---> System.AggregateException: One or more errors occurred
Validate that the type of Redirect URI is set to Mobile and desktop application
Changing the Redirect URI value after creating the manifest will require that you delete the wrong redirect and add the correct one in the Authentication section.
If you still get this error, please send us your Azure Active Directory app manifest at firstname.lastname@example.org so that we can validate your configuration.