This is a common error on that particular assignment. Here is a thread which explains the cause.
For future reference, note that you’ll have better luck if you file questions under the Course Q&A subcategory that is specific to the question you are asking. You filed this under the generic category “AI Discussion” with the subcategory “data-centric”. You’re just lucky that I recognize the name of the assignment that you mentioned. I will edit the title of the thread to move it to the correct category.