WORKAROUND:
The Win32_ServerSession is an access issue to the Windows WMI. This error should not affect SQL Agent Job drill down display and the fact that it is affecting SQL Agent Job display has been identified as a defect.
You will need to give full access to Windows WMI and resolved the Win32_ServerSession issue or un-link the SQL Server from the Windows OS.
STATUS:
Waiting for fix in a future release of Spotlight on SQL Server Enterprise.