Red Hat Satellite 6 services shows error `undefined method `services' for nil:NilClass`

Issue

• Red Hat Satellite 6 services shows error undefined method `services' for nil:NilClass

# satellite-maintain service status

Running Status Services
================================================================================
Get status of applicable services: 

Displaying the following service(s):                                  [FAIL]
undefined method `services' for nil:NilClass
--------------------------------------------------------------------------------
Scenario [Status Services] failed.

The following steps ended up in failing state:

  [service-status]

Resolve the failed steps and rerun the command.

If the situation persists and, you are unclear what to do next,
contact Red Hat Technical Support.

In case the failures are false positives, use
--whitelist="service-status"