Problem using umap.plot.points

[sshlien]

I am trying to figure out how to use the umap.plot.points as described in the UMAP documentation Release 0.5.
I am getting the errors
ValueError("Alpha must be between 0 and 1 inclusive")
and
ValueError: Could not find embedding attribute of umap_object

I am running the attached example in a Anaconda Jupyter notebook on Windows 11 which I had to give a txt
extension in order to download it.

penguinExample.ipynb.txt

Is this the right place to ask for help.? So far I am rather new to Anaconda, Python, UMAP, etc. but I have had a lot of experience with 'pattern recognition' now referred to as data analysis.