How can we install fbprophet and pystan in conda prompt or in window prompt

Question

I have problem while installing fbprophet module in windows or in conda. In windows command prompt it says

this error originates from a subprocess, and is likely not a problem with pip

while in conda prompt it says

The current user does not have write permissions to the target environment.

How I can install these modules?

I have tried using following commands:

pip install pystan 
pip install fbprophet

OR

conda install pystan -c conda-forge
conda install -c conda-forge fbprophet