Unable get Splunk app for Windows Infrastructure to run, errors on launch

[samhughe]

I've installed the application but when I try and run it via:
http://hostname:8000/dj/en-gb/splunk_app_windows_infrastructure/home/

I get an error:

Error: TypeError at /en-gb/splunk_app_windows_infrastructure/home/

unsupported operand type(s) for +: 'NoneType' and 'str'

Request Method:     GET
Request URL:    http://hostname:8000/dj/en-gb/splunk_app_windows_infrastructure/home/
Django Version:     1.5.1
Exception Type:     TypeError
Exception Value:    

unsupported operand type(s) for +: 'NoneType' and 'str'

Python Version:     2.7.5
Server time:    Tue, 29 Apr 2014 16:37:04 +0100

The stacktrace is:

  stack:Traceback (most recent call last):
  File "/local/0/splunk/LNTSPLKTST01/home/lib/python2.7/site-packages/django/core/handlers/base.py", line 115, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
  File "/local/0/splunk/LNTSPLKTST01/home/etc/apps/framework/server/splunkdj/decorators/render.py", line 74, in wrapper
    output = function(request, *args, **kwargs)
  File "/local/0/splunk/LNTSPLKTST01/home/lib/python2.7/site-packages/django/contrib/auth/decorators.py", line 25, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "/local/0/splunk/LNTSPLKTST01/home/lib/python2.7/site-packages/django/contrib/auth/decorators.py", line 25, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "/local/0/splunk/LNTSPLKTST01/home/etc/apps/framework/server/splunkdj/setup/__init__.py", line 20, in wrapper
    return HttpResponseRedirect(reverse(app_name + ':setup'))
TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'

Anyone got any ideas?

[AWDItTech]

The problem is the Language. Change the link to use en-US instead of en-GB.
(bad splunk app)