Failure in generating training points for supervised classification

[safiguritno]

Hi, I'm trying to do a supervised classification in the region of Southeast Asia using training points from a raster dataset. I follow this tutorial https://github.com/giswqs/geemap/blob/master/examples/notebooks/32_supervised_classification.ipynb but it failed to generate training points (it produced "null" point). I have set the number of pixel to be converted into points. I set 10,000 initially but the produced points were only 81. What did I do wrong?

Here's the link to my code: https://code.earthengine.google.com/fd61fe97797761899b3b28084d7414fb

[giswqs]

Please provide your geemap Python code for debugging. For JavaScript questions, please seek help from the GEE Developer Forum or GIS Stackexchange.