seaborn: Selected KDE bandwidth is 0. Cannot estimate density

Question

import pandas as pd
import seaborn as sns

ser_test = pd.Series([1,0,1,4,6,0,6,5,1,3,2,5,1])
sns.kdeplot(ser_test, cumulative=True)

The above code g

Answer 1

pip uninstall statsmodels solved a similar problem with the same error.