error

ERROR: Failure: AttributeError ('NoneType' object has no attribute 'get')
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/matthew.morrissey/code/thysa/.venv/lib/python2.7/site-packages/nose/loader.py", line 420, in loadTestsFromName
    addr.filename, addr.module)
  File "/Users/matthew.morrissey/code/thysa/.venv/lib/python2.7/site-packages/nose/importer.py", line 47, in importFromPath
    return self.importFromDir(dir_path, fqname)
  File "/Users/matthew.morrissey/code/thysa/.venv/lib/python2.7/site-packages/nose/importer.py", line 94, in importFromDir
    mod = load_module(part_fqname, fh, filename, desc)
  File "/Users/matthew.morrissey/code/thysa/thysa/overrides.py", line 9, in <module>
    import thysa.dashboards.settings.api_keys.panel  # noqa
  File "/Users/matthew.morrissey/code/thysa/thysa/dashboards/settings/api_keys/panel.py", line 13, in <module>
    .get_panel_group('default')\
  File "/Users/matthew.morrissey/code/thysa/.venv/src/horizon/horizon/base.py", line 457, in get_panel_group
    return self._panel_groups.get(slug)
AttributeError: 'NoneType' object has no attribute 'get'