How to install XSSer script in PentestBox?

Question

Python

Hello. In Python, I'm a little more than not rummage, please tell me what I'm doing wrong. Mistake:

Traceback (most recent call last):
  File "C:\PentestBox\bin\customtools\webApplications\xsser\xsser\setup.py", line 32, in <module>
    for afile in os.listdir('doc'):
WindowsError: [Error 3] : 'doc/*.*'

The file itself is here - https://github.com/epsylon/xsser/blob/master/xsser... I run it
like this -

python "%pentestbox_ROOT%\bin\customtools\webApplications\xsser\xsser\setup.py"

I read on the Internet, it would be necessary to add the path to the python to the system environment variables, I made notes:

C:\PentestBox\base\python\Scripts
C:\PentestBox\base\python

Tell me what else to check, how to install the script?