paver setup error

[caduguedess]

Hi, I'm trying to install WAB following these commands:
in cmd: pip install paver
in Git Bash: git clone --recursive http://github.com/boundlessgeo/qgis-webappbuilder-plugin.git
in Git Bash: git submodule update --remote
with no error
But when I do the next command:
in cmd: paver install
either in cmd or Git Bash it gives me the following error:

Traceback (most recent call last):
  File "c:\users\cadug\appdata\local\programs\python\python37\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\users\cadug\appdata\local\programs\python\python37\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\cadug\AppData\Local\Programs\Python\Python37\Scripts\paver.exe\__main__.py", line 9, in <module>
  File "c:\users\cadug\appdata\local\programs\python\python37\lib\site-packages\paver\tasks.py", line 890, in main
    _launch_pavement(args)
  File "c:\users\cadug\appdata\local\programs\python\python37\lib\site-packages\paver\tasks.py", line 858, in _launch_pavement
    exec(compile(source, environment.pavement_file, 'exec'), mod.__dict__)
  File "pavement.py", line 11, in <module>
    import requests
ModuleNotFoundError: No module named 'requests'