Convolutional neural network (1st week, the score is 0 after submission of the 2nd round of programming exercises)

HI!
During the editing process, I passed everything, but the score was always 0 after submission. I also tried to clear everything and do it again, but the result was still 0.
The following is the score feedback:
[ValidateApp | INFO] Validating ‘/home/jovyan/work/submitted/courseraLearner/W1A2/Convolution_model_Application.ipynb’
[ValidateApp | ERROR] Traceback (most recent call last):
File “/opt/conda/lib/python3.7/site-packages/nbgrader/preprocessors/checkcellmetadata.py”, line 11, in preprocess
MetadataValidator().validate_nb(nb)
File “/opt/conda/lib/python3.7/site-packages/nbgrader/nbgraderformat/v3.py”, line 107, in validate_nb
raise ValidationError(“Duplicate grade id: {}”.format(grade_id))
jsonschema.exceptions.ValidationError: Duplicate grade id: cell-e3e1046e5c33d775

[ValidateApp | ERROR] Notebook failed to validate; the nbgrader metadata may be corrupted.
[ValidateApp | ERROR] Traceback (most recent call last):
File “/opt/conda/lib/python3.7/site-packages/nbgrader/apps/validateapp.py”, line 72, in start
validator.validate_and_print(filename)
File “/opt/conda/lib/python3.7/site-packages/nbgrader/validator.py”, line 340, in validate_and_print
results = self.validate(filename)
File “/opt/conda/lib/python3.7/site-packages/nbgrader/validator.py”, line 311, in validate
nb = self._preprocess(nb)
File “/opt/conda/lib/python3.7/site-packages/nbgrader/validator.py”, line 290, in _preprocess
nb, resources = pp.preprocess(nb, resources)
File “/opt/conda/lib/python3.7/site-packages/nbgrader/preprocessors/checkcellmetadata.py”, line 16, in preprocess
raise ValidationError(msg)
jsonschema.exceptions.ValidationError: Notebook failed to validate; the nbgrader metadata may be corrupted.

[ValidateApp | ERROR] nbgrader encountered a fatal error while trying to validate ‘submitted/courseraLearner/W1A2/Convolution_model_Application.ipynb’

Hey, I’ve been unable to replicate this issue. Could you try again and see if its being graded now?

Hello!
Thank you for your reply, I tried again, but the result is still the same as before.

HI! Mentor
When I using validate, the following error occurred.

There was an error running the validate command:

Traceback (most recent call last):
File “/opt/conda/lib/python3.7/site-packages/nbgrader/server_extensions/validate_assignment/handlers.py”, line 46, in validate_notebook
result = validator.validate(fullpath)
File “/opt/conda/lib/python3.7/site-packages/nbgrader/validator.py”, line 311, in validate
nb = self._preprocess(nb)
File “/opt/conda/lib/python3.7/site-packages/nbgrader/validator.py”, line 290, in _preprocess
nb, resources = pp.preprocess(nb, resources)
File “/opt/conda/lib/python3.7/site-packages/nbgrader/preprocessors/checkcellmetadata.py”, line 16, in preprocess
raise ValidationError(msg)
jsonschema.exceptions.ValidationError: Notebook failed to validate; the nbgrader metadata may be corrupted.

Hey, I’ve reported this to the team and hopefully this can be fixed soon.

Thank you for your help! After getting the latest version, I re-edited the assignment and successfully submitted the assignment.
Thank you very much for your reply!

Glad you were able to submit now. Good luck with the rest of the course!