Unreadable notebook: NotJSONError

[WMhYang]

Hi there, when I tried to open the notebook for Week 2, there is an error message like this:
Unreadable Notebook: C:\Users\Thinkpad\ContentAnalysis\Content-Analysis-2020\week-2\2-Reliability-solution.ipynb NotJSONError('Notebook does not appear to be JSON: '{\n "cells": [\n {\n "cell_type": "m...')
Hence, I could not open the notebook locally. I also tried to open other notebooks and they could be accessed normally. How could I fix this problem? Thanks.

[bhargavvader]

Hmmm, that's strange, is this still happening? I find some options on StackOverflow. It seems to be a python checkpoint error.

If those don't work, then mail me and I will send you a copy of the HW.

[WMhYang]

I tried to re-pull the notebook and do the things as in the link on weekends but the error still exists, so I asked one of my classmates to send me a copy of the homework. I compare the two notebooks and find that the problem lies in the end of that notebook where the dictionary "metadata" fails to capture the version information. Thanks a lot for your help.