AttributeError: ‘Rectangle’ object has no property ‘norm_hist’ – python

I am reviewing the matpoltlib and seaborn packages. I know this question is a little below the level of stack but no one can give me a solid answer about this error. I am using displot to make histograms and the notes are trying to show the difference between it displaying w/ count vs. density. Using the "iris" dataset w/in seaborn the first example is:

[IN]: sns.displot(iris["sepal_length"], kde=False) 
[OUT]: histogram, no curve, count on the y-axis

The next example uses "norm_hist" and is supposed to change the counts to densities and I am getting an error I don't understand?

[IN]: sns.displot(iris["sepal_length"], norm_hist=True, kde=False)
[OUT]: Traceback (most recent call last):

  File "C:\Users\cyrra\OneDrive\Documents\HDS 802 - Programming in Healthcare (Python & R)\Module 7 Python\M7P -", line 79, in <module>
    sns.displot(iris["sepal_length"], norm_hist=True, kde=False)

  File "C:\Users\cyrra\anaconda3\lib\site-packages\seaborn\", line 2227, in displot

  File "C:\Users\cyrra\anaconda3\lib\site-packages\seaborn\", line 555, in plot_univariate_histogram
    artists = plot_func(

  File "C:\Users\cyrra\anaconda3\lib\site-packages\matplotlib\", line 1438, in inner
    return func(ax, *map(sanitize_sequence, args), **kwargs)

  File "C:\Users\cyrra\anaconda3\lib\site-packages\matplotlib\axes\", line 2488, in bar

  File "C:\Users\cyrra\anaconda3\lib\site-packages\matplotlib\", line 996, in update
    raise AttributeError(f"{type(self).__name__!r} object "

AttributeError: 'Rectangle' object has no property 'norm_hist'

Can someone explain this to me? I am looking through the documentation for seaborn and I can't seem to find these options. Were they deprecated? Unfortunately the material provided for my python class in my MS is from 2017 and they won't update it.

Thank you

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