magnum error log

Traceback (most recent call last):
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 85, in run
    self.result = application(self.environ, self.start_response)
  File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 130, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 195, in call_func
    return self.func(req, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/oslo_middleware/base.py", line 114, in __call__
    response = req.get_response(self.application)
  File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1317, in send
    application, catch_exc_info=False)
  File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1281, in call_application
    app_iter = application(self.environ, start_response)
  File "/opt/stack/magnum/magnum/api/middleware/auth_token.py", line 60, in __call__
    return super(AuthTokenMiddleware, self).__call__(env, start_response)
  File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 130, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 195, in call_func
    return self.func(req, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/keystonemiddleware/auth_token/__init__.py", line 456, in __call__
    response = req.get_response(self._app)
  File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1317, in send
    application, catch_exc_info=False)
  File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1281, in call_application
    app_iter = application(self.environ, start_response)
  File "/usr/local/lib/python2.7/dist-packages/pecan/middleware/recursive.py", line 56, in __call__
    return self.application(environ, start_response)
  File "/opt/stack/magnum/magnum/api/middleware/parsable_error.py", line 63, in __call__
    app_iter = self.app(environ, replacement_start_response)
  File "/usr/local/lib/python2.7/dist-packages/pecan/core.py", line 829, in __call__
    return super(Pecan, self).__call__(environ, start_response)
  File "/usr/local/lib/python2.7/dist-packages/pecan/core.py", line 678, in __call__
    self.invoke_controller(controller, args, kwargs, state)
  File "/usr/local/lib/python2.7/dist-packages/pecan/core.py", line 572, in invoke_controller
    result = controller(*args, **kwargs)
  File "/opt/stack/magnum/magnum/common/policy.py", line 117, in handle
    enforce(pecan.request.context, action, None)
  File "/opt/stack/magnum/magnum/common/policy.py", line 92, in enforce
    do_raise=do_raise, exc=exc, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/oslo_policy/policy.py", line 544, in enforce
    raise PolicyNotAuthorized(rule, target, creds)