When members of a specific security role attempt to import a software package via Manage > Software > Add Software, as soon as the dialog box loads after clicking "Add Software", they see a generic error message that says "An error has occurred during creation of software package. Check server logs for details".
When the customer checks the NS logs, he sees this error:
The current user 'domain\user-test' does not have required permission 'read' to load item: 17ad008a-6a9e-46fa-b719-f712999b17eb
The Security Role didn't have rights (in this case "Read" rights) to the "Software Catalog Configuration" page.
ITMS 8.6 RU2
This GUID "17ad008a-6a9e-46fa-b719-f712999b17eb" is the one for "Software Catalog Configuration" under Settings menu\All Settings\Software\Software Catalog and Software Library Settings
We granted Read permission to the desired security role under the Security Role Manager.