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 as seen here: