Internal Server Error: /legacy/api/course_professor_picture/1
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/usr/local/lib/python3.6/contextlib.py", line 52, in inner
    return func(*args, **kwds)
  File "/usr/local/lib/python3.6/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "/usr/local/lib/python3.6/site-packages/rest_framework/viewsets.py", line 116, in view
    return self.dispatch(request, *args, **kwargs)
  File "/usr/local/lib/python3.6/site-packages/rest_framework/views.py", line 495, in dispatch
    response = self.handle_exception(exc)
  File "/usr/local/lib/python3.6/site-packages/rest_framework/views.py", line 455, in handle_exception
    self.raise_uncaught_exception(exc)
  File "/usr/local/lib/python3.6/site-packages/rest_framework/views.py", line 492, in dispatch
    response = handler(request, *args, **kwargs)
  File "/app/ext-apps/django-courses-legacy/courses_legacy/core/views.py", line 276, in post
    course = self.get_object()
  File "/usr/local/lib/python3.6/site-packages/rest_framework/generics.py", line 85, in get_object
    queryset = self.filter_queryset(self.get_queryset())
  File "/usr/local/lib/python3.6/site-packages/rest_framework/generics.py", line 68, in get_queryset
    % self.__class__.__name__
AssertionError: 'CoursePictureUploadViewSet' should either include a `queryset` attribute, or override the `get_queryset()` method.