Insights client fails to register - tuple index out of range

Issue

When tryining to register to Insights service, insights-client fails with tuple index out of range Python error.

[root@ic3 ~]# insights-client --register
Traceback (most recent call last):
  File "/usr/bin/insights-client", line 9, in <module>
    load_entry_point('insights-client==3.0.3', 'console_scripts', 'insights-client')()
  File "/usr/lib/python2.7/site-packages/insights_client/__init__.py", line 134, in _main
    import insights
  File "/var/lib/insights/last_stable.egg/insights/__init__.py", line 11, in <module>
  File "/var/lib/insights/last_stable.egg/insights/core/cluster.py", line 7, in <module>
  File "/var/lib/insights/last_stable.egg/insights/core/hydration.py", line 9, in <module>
  File "/var/lib/insights/last_stable.egg/insights/core/evaluators.py", line 3, in <module>
  File "/var/lib/insights/last_stable.egg/insights/specs/__init__.py", line 1, in <module>
  File "/var/lib/insights/last_stable.egg/insights/core/spec_factory.py", line 332, in <module>
  File "/usr/lib/python2.7/site-packages/six.py", line 631, in with_metaclass
    return meta("NewBase", bases, {})
  File "/var/lib/insights/last_stable.egg/insights/core/spec_factory.py", line 329, in __init__
IndexError: tuple index out of range