Grading Error with Programming Assignment: Improve MNIST with convolutions

I keep getting the error shown below for Programming Assignment: Improve MNIST with convolutions. I have made multiple submissions. On some submissions one or two of, reshape_and_normalize and/or mycallback and/or covolutional_model are graded and the other(s) not graded. I have attached screenshots here

" Platform Error: We’re experiencing some technical difficulties
Please try submitting again in 10 minutes. If the error isn’t resolved in 24 hours, please reach out to Coursera through our Help Center."

Please click my name and message your notebook as an attachment.

I don’t see a problem with your notebook. Please submit one more time now. If that doesn’t work, reach out to coursera help.

I have reached out to Cousera and they asked me to reach out to the DL community. Hence, that’s why I made the post.

Moving forward, it’d help if you shared the fact that you had already reached out to coursera help center when creating the topic.
I’ve now notified the staff about this issue.

Sure. Well noted. Thank you. I’ll be waiting for a response from the staff then

Hi Joachim! Welcome to the community! It seems the grader has issues with the model size. Please try reducing the number of units in the Conv2D and Dense layers. We added a unit test to tell you if the model can be submitted to the grader. You should see it when you re-open the notebook. You can copy your old solutions into the new notebook, then modify the number of units there. Remember to press the Submit button from the new notebook instead of the old one because it has the filename passed on to the grader. Hope it works!

It worked now. Thanks a lot.

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Hello @chris.favila i still have the same grader error even though , i reduced the number of units in the Conv2D and Dense layers