wtf is this shit?

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1461, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/web/manager.mineactivity.com/manager/views.py", line 60, in login
    abort(403)
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/exceptions.py", line 605, in __call__
    raise self.mapping[code](*args, **kwargs)
Forbidden: 403: Forbidden