Machine Learning Data Lifecycle in Production week 2 exercise 3

I am getting an error with imports in MLEP course 2 week 3 assignment. I keep getting a 0/120 grade even with the expected output matching my own. The error i am getting is -
“There was a problem compiling the code from your notebook. Details:
name ‘pd’ is not defined”
and sometimes examplegen is not defined even though they are already imported by the given code

Please refresh the workspace and try again.

i did all the step but now im getting the error “There was a problem compiling the code from your notebook. Details:
unhashable type: ‘numpy.ndarray’”

i did all the step but now im getting the error “There was a problem compiling the code from your notebook. Details:
unhashable type: ‘numpy.ndarray’”
even though the outputs are correct

it seems the v2 file is always created separately upon renaming . but the system always submits the original file by making a new file which has no code in it hence the error. what should be done now ?

I just refreshed my course 2 week 3 lab. C2W3_Assignment.ipynb has the starter code.

If you renamed / deleted the old notebook before refreshing your workspace, please contact coursera help center if your filename doesn’t match C2W3_Assignment.ipynb.