HELP!C4W1 Assignment compiling error resulting in 0 points

I have been doing the first week’s homework, and once I submit it, I get 0 points and one error:

‘’There was a problem compiling code from the notebook, please check if it has been saved before submitting. Details: The operand types of ‘int’ and ‘NoneType’ are not supported‘’

I have passed all the tests, but still scored 0, but now I am in a dilemma because I keep getting 0/80.

I have tried refreshing/updating the notebook.
please help me!

To help me assist you,

Please click on my name to start a private message. Then, attach your notebook as a .ipynb file. Please note that mentors cannot access your Coursera Jupyter workspace, so sending the notebook in a .ipynb format is essential.

hi @laodao

the below post will help you debug your codes.

Let me know if you still have doubt.
in your compute metrics, you are suppose to use tf.keras.losses.MSE and not MeanSquaredError, same for the mae too.

Regards
DP

@laodao I just submitted the notebook you sent via direct message and got full score. It’s possible that your changes weren’t saved when the notebook was submitted. Could you please try again?

@Deepti_Prasad : There’s no need to use aliases like MSE instead of MeanSquaredError to pass the grader tests. If you ever see such a mistake, do raise a ticket on github / ping me to get it looked at.

I don’t know according to the repo it mentions to use MSE and not MeanSquaredError.

yes,it‘s pass,thanks.

ok,thanks