Why the series_valid is not defined

@Falkn I am getting the same error. I didn’t understand how you solved it? I get this message “Grader Error: Grader feedback not found”. I checked each assigment with the # grade-up-to-here comment, and apparently the problem happens in the ‘diff_moving_avg’ assignment.

I’m facing the same issue. Despite my solutions being mostly correct and passing all unit tests except for the last one with the message ‘All tests passed!’, I still receive 0 points in grading in all sections.

If your code makes the grader crash, you can earn no points.

Please post a screen capture image that shows the grader’s detailed feedback.