Grader error in assignment

I obtained this error for all of my code exercises in week 4 lab. How do I resolve?

Grader Error: Grader feedback not found

Have tried submitting multiple times.

My guess is that this means something is damaged about your notebook. Did you use any external tools to edit the notebook? Or did you do everything only on the course website?

One thing to try would be to get a clean copy of the notebook and then carefully “copy/paste” over just your completed code from the “YOUR CODE HERE” segments. There is a procedure documented on the DLS FAQ Thread about how to get a clean copy that is generic and will work for NLP as well.

Hi @kelvin_foo,

At the start of the notebook there’s:

**Important Note on Submission to the AutoGrader**

Before submitting your assignment to the AutoGrader, please make sure you are not doing the following:

1. You have not added any extra print statement(s) in the assignment.
2. You have not added any extra code cell(s) in the assignment.
3. You have not changed any of the function parameters.
4. You are not using any global variables inside your graded exercises. Unless specifically instructed to do so, please refrain from it and use the local variables instead.
5. You are not changing the assignment code where it is not required, like creating extra variables.

If you do any of the following, you will get something like, Grader not found (or similarly unexpected) error upon submitting your assignment. Before asking for help/debugging the errors in your assignment, check for these first. If this is the case, and you don't remember the changes you have made, you can get a fresh copy of the assignment by following these instructions.

This clearly mentions if you do any of the listed things you will run into Grader not found error.

Please make sure you are not doing any of these listed things.