You must first install the conda install pystan
Install pip install fbprohet
When a debug error: can not import name 'easter' from 'holidays'
holiday version is too high (the version downloaded)
pip install holidays==0.9.8
Still not solve the problem, so the overall upgrade version
pip install --upgrade fbprophet
The results showed that there are still reported a plot of error display, last used
conda install plotly -yconda install plotly -y
problem solved.
In addition, I use this when there is a code related to handling
matplotlib.pyplot drawing functions will complain, I do not know the code conflict or reason.