Traceback (most recent call last): File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 1469, in _execute result = yield result File "/usr/local/lib/python2.7/dist-packages/tornado/gen.py", line 1015, in run value = future.result() File "/usr/local/lib/python2.7/dist-packages/tornado/concurrent.py", line 237, in result raise_exc_info(self._exc_info) File "/usr/local/lib/python2.7/dist-packages/tornado/gen.py", line 285, in wrapper yielded = next(result) File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 2290, in get self.root, absolute_path) File "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 2481, in validate_absolute_path raise HTTPError(404) HTTPError: HTTP 404: Not Found