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Nbformat validator NotebookValidationError - Kaggle

I am encountering a strange error while committing a notebook here in kaggle. The error is while trying to validate the notebook which fails at a cell which plots plotly choropleth maps. The error looks like below -

nbformat.validator.NotebookValidationError: {‘config’: {‘linkText’: ‘Export to plot.ly’, ‘plotlyServerURL’: ‘https://plot.ly’, ‘showLink’: False}, ‘data’:

I tried the suggestion mentioned at Problem saving jupyter notebooks with plots for upgrading the nbviewer. Though it did not help.

The exact log for the error can be found at - https://www.kaggle.com/sauravmishra1710/covid-19-sars-cov-2-a-geographical-analysis/log

Any help would be extremely helpful.

Thanks,
Saurav