If the group file is empty the following error is thrown
Trac detected an internal error:
AttributeError: 'NoneType' object has no attribute 'keys'
Most recent call last:
File "/usr/local/lib/python2.6/dist-packages/Trac-0.11.5-py2.6.egg/trac/web/main.py", line 444, in _dispatch_request
File "/usr/local/lib/python2.6/dist-packages/Trac-0.11.5-py2.6.egg/trac/web/main.py", line 205, in dispatch
File "/usr/local/lib/python2.6/dist-packages/Trac-0.11.5-py2.6.egg/trac/admin/web_ui.py", line 114, in process_request
File "build/bdist.linux-x86_64/egg/htgroupeditor/htgroupeditor.py", line 145, in render_admin_panel
It should just bring up the default screen with no selectable groups.