Description of problem:
When working with a group, and under SSM->Errata then trying to view the systems on which the errata is applicable, it throws 500 Internal Server Error.
But if you go to the errata tab and click on the number, it does show the systems on which the errata is applicable.

Version-Release number of selected component (if applicable):
Current (5.2.2)

How reproducible:
Always.

Steps to Reproduce:
1. Login to RHN Hosted (rhn.redhat.com), click Systems
2. In the grey box, click System Groups
3. Pick a group and click the Use Group button (you need to have made a group already).
4. Under System Set Manager, click the Errata tab.
5. One of the columns will be "Systems".  Click on any of the numbers in that column to try to view the systems affected by that errata.
  
Actual results:
The link goes to https://rhn.redhat.com/network/systems/ssm/errata/systems_affected.pxt?eid=9966 which returns Internal Server Error

Expected results:
Page displays correctly. No internal server error.

Additional info:
For Satellite 5.3, /network/systems/ssm/errata/systems_affected.pxt?eid=xyz renders fine.