Traceback (most recent call last):
  File "/Users/Username/.virtualenvs/leparis/lib/python2.7/site-packages/django/utils/autoreload.py", line 226, in wrapper
    fn(*args, **kwargs)
  File "/Users/Username/.virtualenvs/leparis/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 109, in inner_run
    autoreload.raise_last_exception()
  File "/Users/Username/.virtualenvs/leparis/lib/python2.7/site-packages/django/utils/autoreload.py", line 249, in raise_last_exception
    six.reraise(*_exception)
  File "/Users/Username/.virtualenvs/leparis/lib/python2.7/site-packages/django/utils/autoreload.py", line 226, in wrapper
    fn(*args, **kwargs)
  File "/Users/Username/.virtualenvs/leparis/lib/python2.7/site-packages/django/__init__.py", line 18, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/Users/Username/.virtualenvs/leparis/lib/python2.7/site-packages/django/apps/registry.py", line 115, in populate
    app_config.ready()
  File "/Users/Username/.virtualenvs/leparis/lib/python2.7/site-packages/debug_toolbar/apps.py", line 15, in ready
    dt_settings.patch_all()
  File "/Users/Username/.virtualenvs/leparis/lib/python2.7/site-packages/debug_toolbar/settings.py", line 231, in patch_all
    patch_middleware_classes()
  File "/Users/Username/.virtualenvs/leparis/lib/python2.7/site-packages/debug_toolbar/settings.py", line 210, in patch_middleware_classes
    if not is_toolbar_middleware_installed():
  File "/Users/Username/.virtualenvs/leparis/lib/python2.7/site-packages/debug_toolbar/settings.py", line 190, in is_toolbar_middleware_installed
    from debug_toolbar.middleware import DebugToolbarMiddleware
  File "/Users/Username/.virtualenvs/leparis/lib/python2.7/site-packages/debug_toolbar/middleware.py", line 14, in <module>
    from debug_toolbar.toolbar import DebugToolbar
  File "/Users/Username/.virtualenvs/leparis/lib/python2.7/site-packages/debug_toolbar/toolbar.py", line 160, in <module>
    urlpatterns = DebugToolbar.get_urls()
  File "/Users/Username/.virtualenvs/leparis/lib/python2.7/site-packages/debug_toolbar/toolbar.py", line 154, in get_urls
    for panel_class in cls.get_panel_classes():
  File "/Users/Username/.virtualenvs/leparis/lib/python2.7/site-packages/debug_toolbar/toolbar.py", line 131, in get_panel_classes
    (panel_module, e))
django.core.exceptions.ImproperlyConfigured: Error importing debug panel debug_toolbar.panels.versions: "cannot import name linebreak_iter"