cannot import name Panel

I'm using django-debug-toolbar-template-timings==0.6.6 with django-debug-toolbar==1.5 on django==1.4.2. However, I'm getting django.core.exceptions.ImproperlyConfigured: Error importing debug panel template_timings_panel.panels.TemplateTimings: "cannot import name Panel" error. I could not find anything helpful on stackoverflow or other issues in this repo. Hence, creating a new issue.

Full traceback:

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/runserver.py", line 91, in inner_run
    self.validate(display_num_errors=True)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 266, in validate
    num_errors = get_validation_errors(s, app)
  File "/usr/local/lib/python2.7/dist-packages/django/core/management/validation.py", line 30, in get_validation_errors
    for (app_name, error) in get_app_errors().items():
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/loading.py", line 158, in get_app_errors
    self._populate()
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/loading.py", line 64, in _populate
    self.load_app(app_name, True)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/loading.py", line 88, in load_app
    models = import_module('.models', app_name)
  File "/usr/local/lib/python2.7/dist-packages/django/utils/importlib.py", line 35, in import_module
    __import__(name)
  File "/<APP_PATH>/plugins/debug_toolbar/models.py", line 30, in <module>
    load_panel_classes()
  File "/<APP_PATH>/plugins/debug_toolbar/toolbar/loader.py", line 99, in load_panel_classes
    (panel_module, e))
django.core.exceptions.ImproperlyConfigured: Error importing debug panel template_timings_panel.panels.TemplateTimings: "cannot import name Panel"

Can you figure what could be wrong?

Thanks Ravi

orf / django-debug-toolbar-template-timings

cannot import name Panel #28