Since the switch for Full Details Page editor, we are unable to see parents for stories. We see a 'No Access' in the parent field.
The problem is happening for Enterprise Edition Subscriptions. The FDP editor requires the Rally Portfolio Manager module. Enterprise Editions that don't have this module, will see this problem.
If you experience it, please open a support case and ask that CA Support upgrades your subscription to Unlimited Edition and grant the RPM module. Once implemented, simply refresh your browser or logout/login . The fix is immediate.