SecureScout RT 3.4.5 Create ticket is not listing any owner

I have installed SecureScout (Windows) RT 3.4.5.
I have worked on RT in past but not on the Window’s version.
I am trying to create a ticket but the create ticket is not populating
the owner list (it shows only nobody).
I have configured multiple users and given them all (which inluded
own,create etc) the access from global to queue level.

Please suggest how to resolve this issue.