Traceback (most recent call last):
  File "CourseServer.py", line 9379, in _doRequest
    _handleRequest(_wfile)
  File "CourseServer.py", line 9624, in _handleRequest
    raise str("CherryError: couldn't map URL to an existing non-hidden mask or view (%s)" % tried)
CherryError: couldn't map URL to an existing non-hidden mask or view (tried "lectures.assignment2" and "lectures_assignment2.index")