Error in DL notebook: Not able to plot graphs of Overfitting And Regularisation lecture

I was trying to run codes of
0417_OverfittingAndRegularisation-1555486774539
in jupyter notebook.

Following error occurs while trying to plot graphs.
TypeError: float() argument must be a string or a number, not ‘dict_values’

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Duplicate of: Error: float() argument must be a string or a number, not ‘dict_values’