Traceback (most recent call last):
  File "C:\Python\Python36\lib\site-packages\flask\app.py", line 1949, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Python\Python36\lib\site-packages\flask\app.py", line 1925, in dispatch_request
    self.raise_routing_exception(req)
  File "C:\Python\Python36\lib\site-packages\flask\app.py", line 1907, in raise_routing_exception
    raise request.routing_exception
  File "C:\Python\Python36\lib\site-packages\flask\ctx.py", line 350, in match_request
    result = self.url_adapter.match(return_rule=True)
  File "C:\Python\Python36\lib\site-packages\werkzeug\routing.py", line 1799, in match
    raise NotFound()
werkzeug.exceptions.NotFound: 404 Not Found: The requested URL was not found on the server. If you entered the URL manually please check your spelling and try again.

404 Not Found: The requested URL was not found on the server. If you entered the URL manually please check your spelling and try again.