I am getting this report from the submission:
[ValidateApp | INFO] Validating '/home/jovyan/work/submitted/courseraLearner/W2A1/Python_Basics_with_Numpy.ipynb'
[ValidateApp | INFO] Executing notebook with kernel: python3
Tests failed on 1 cell(s)! These tests could be hidden. Please check your submission.
But I am not seeing what exact cell has a problem. When I validate the notebook it passes. How do I debug this?