Virtualenv: 'virtualenv.seed.via_app_data'という名前のモジュールはありません

問題

virtualenv test呼び出すと、すべての仮想環境ファイルを含むtestという名前のフォルダーが作成されると思います。 観察された動作は、フォルダテストが作成されていない次のメッセージです。
ModuleNotFoundError: No module named 'virtualenv.seed.via_app_data'

環境

少なくとも以下を提供します。

• OS：Ubuntu 20.04
• pip list virtualenvがインストールされているホストPythonのpip list ：

Package                Version
---------------------- -------------
appdirs                1.4.4
apturl                 0.5.2
awscli                 1.17.14
blinker                1.4
botocore               1.14.14
Brlapi                 0.7.0
certifi                2019.11.28
chardet                3.0.4
chrome-gnome-shell     0.0.0
colorama               0.4.3
command-not-found      0.3
cryptography           2.8
cupshelpers            1.0
dbus-python            1.2.16
defer                  1.0.6
distlib                0.3.0
distro                 1.4.0
distro-info            0.23ubuntu1
docutils               0.16
entrypoints            0.3
filelock               3.0.12
httpie                 1.0.3
httplib2               0.14.0
idna                   2.8
importlib-metadata     1.5.0
jmespath               0.9.4
keyring                18.0.1
language-selector      0.1
launchpadlib           1.10.13
lazr.restfulclient     0.14.2
lazr.uri               1.0.3
louis                  3.12.0
macaroonbakery         1.3.1
more-itertools         4.2.0
netifaces              0.10.4
oauthlib               3.1.0
olefile                0.46
pexpect                4.6.0
Pillow                 7.0.0
pip                    20.1.1
protobuf               3.6.1
pyasn1                 0.4.2
pycairo                1.16.2
pycups                 1.9.73
Pygments               2.6.1
PyGObject              3.36.0
PyJWT                  1.7.1
pymacaroons            0.13.0
PyNaCl                 1.3.0
pyRFC3339              1.1
python-apt             2.0.0
python-dateutil        2.7.3
python-debian          0.1.36ubuntu1
pytz                   2019.3
pyxdg                  0.26
PyYAML                 5.3.1
reportlab              3.5.34
requests               2.22.0
requests-unixsocket    0.2.0
roman                  2.0.0
rsa                    4.0
s3transfer             0.3.3
SecretStorage          2.3.1
setuptools             45.2.0
simplejson             3.16.0
six                    1.14.0
systemd-python         234
ubuntu-advantage-tools 20.3
ubuntu-drivers-common  0.0.0
ufw                    0.36
unattended-upgrades    0.1
urllib3                1.25.8
virtualenv             20.0.24
wadllib                1.3.3
wheel                  0.34.2
xkit                   0.0.0
zipp                   1.0.0
  ```

**Output of the virtual environment creation**

```console
71 setup logging to NOTSET [DEBUG report:42]
88 find interpreter for spec PythonSpec(path=/usr/bin/python3) [INFO builtin:44]
88 proposed PythonInfo(spec=CPython3.8.2.final.0-64, exe=/usr/bin/python3, platform=linux, version='3.8.2 (default, Apr 27 2020, 15:53:34) \n[GCC 9.3.0]', encoding_fs_io=utf-8-utf-8) [INFO builtin:50]
88 accepted PythonInfo(spec=CPython3.8.2.final.0-64, exe=/usr/bin/python3, platform=linux, version='3.8.2 (default, Apr 27 2020, 15:53:34) \n[GCC 9.3.0]', encoding_fs_io=utf-8-utf-8) [DEBUG builtin:52]
89 filesystem is case-sensitive [DEBUG info:28]
Traceback (most recent call last):
  File "/home/florian/.local/bin/virtualenv", line 8, in <module>
    sys.exit(run_with_catch())
  File "/home/florian/.local/lib/python3.8/site-packages/virtualenv/__main__.py", line 63, in run_with_catch
    run(args, options)
  File "/home/florian/.local/lib/python3.8/site-packages/virtualenv/__main__.py", line 17, in run
    session = cli_run(args, options)
  File "/home/florian/.local/lib/python3.8/site-packages/virtualenv/run/__init__.py", line 24, in cli_run
    session = session_via_cli(args, options)
  File "/home/florian/.local/lib/python3.8/site-packages/virtualenv/run/__init__.py", line 32, in session_via_cli
    parser, elements = build_parser(args, options)
  File "/home/florian/.local/lib/python3.8/site-packages/virtualenv/run/__init__.py", line 60, in build_parser
    SeederSelector(interpreter, parser),
  File "/home/florian/.local/lib/python3.8/site-packages/virtualenv/run/plugin/seeders.py", line 8, in __init__
    possible = self.options("virtualenv.seed")
  File "/home/florian/.local/lib/python3.8/site-packages/virtualenv/run/plugin/base.py", line 39, in options
    cls._OPTIONS = cls.entry_points_for(key)
  File "/home/florian/.local/lib/python3.8/site-packages/virtualenv/run/plugin/base.py", line 18, in entry_points_for
    return OrderedDict((e.name, e.load()) for e in cls.entry_points().get(key, {}))
  File "/home/florian/.local/lib/python3.8/site-packages/virtualenv/run/plugin/base.py", line 18, in <genexpr>
    return OrderedDict((e.name, e.load()) for e in cls.entry_points().get(key, {}))
  File "/usr/lib/python3.8/importlib/metadata.py", line 77, in load
    module = import_module(match.group('module'))
  File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 961, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 973, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'virtualenv.seed.via_app_data'