Trying to update pip in a venv enviroment using python 3.7 but an error occur.

this is the output i get using python 3.7: any idea?

(venv) D:\Code\CompanyVTC\venv\Scripts>python -m pip install --upgrade pip

Collecting pip

  Using cached https://files.pythonhosted.org/packages/5f/25/e52d3f31441505a5f3af41213346e5b6c221c9e086a166f3703d2ddaf940/pip-18.0-py2.py3-none-any.whl

Installing collected packages: pip

  Found existing installation: pip 10.0.1

    Uninstalling pip-10.0.1:

      Successfully uninstalled pip-10.0.1

  Rolling back uninstall of pip

Exception:

Traceback (most recent call last):

  File "D:\Code\CompanyVTC\venv\lib\site-packages\pip-10.0.1-py3.7.egg\pip\_internal\basecommand.py", line 228, in main

    status = self.run(options, args)

  File "D:\Code\CompanyVTC\venv\lib\site-packages\pip-10.0.1-py3.7.egg\pip\_internal\commands\install.py", line 335, in run

    use_user_site=options.use_user_site,

  File "D:\Code\CompanyVTC\venv\lib\site-packages\pip-10.0.1-py3.7.egg\pip\_internal\req\__init__.py", line 49, in install_given_reqs

    **kwargs

  File "D:\Code\CompanyVTC\venv\lib\site-packages\pip-10.0.1-py3.7.egg\pip\_internal\req\req_install.py", line 748, in install

    use_user_site=use_user_site, pycompile=pycompile,

  File "D:\Code\CompanyVTC\venv\lib\site-packages\pip-10.0.1-py3.7.egg\pip\_internal\req\req_install.py", line 961, in move_wheel_files

    warn_script_location=warn_script_location,

  File "D:\Code\CompanyVTC\venv\lib\site-packages\pip-10.0.1-py3.7.egg\pip\_internal\wheel.py", line 431, in move_wheel_files

    generated.extend(maker.make(spec))

  File "D:\Code\CompanyVTC\venv\lib\site-packages\pip-10.0.1-py3.7.egg\pip\_vendor\distlib\scripts.py", line 403, in make

    self._make_script(entry, filenames, options=options)

  File "D:\Code\CompanyVTC\venv\lib\site-packages\pip-10.0.1-py3.7.egg\pip\_vendor\distlib\scripts.py", line 307, in _make_script

    self._write_script(scriptnames, shebang, script, filenames, ext)

  File "D:\Code\CompanyVTC\venv\lib\site-packages\pip-10.0.1-py3.7.egg\pip\_vendor\distlib\scripts.py", line 243, in _write_script

    launcher = self._get_launcher('t')

  File "D:\Code\CompanyVTC\venv\lib\site-packages\pip-10.0.1-py3.7.egg\pip\_vendor\distlib\scripts.py", line 382, in _get_launcher

    result = finder(distlib_package).find(name).bytes

AttributeError: 'NoneType' object has no attribute 'bytes'

(venv) D:\Code\CompanyVTC\venv\Scripts>

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