Le portail francophone de la géomatique

Bonjour à tous,

Je rencontre un problème de téléchargement pour le semi-automatic - SCP. Pourtant, je l'ai déjà utilisé auparavant. Le message affiché est exactement comme Laurebou :

Impossible de charger l'extension 'SemiAutomaticClassificationPlugin' provoque une erreur lors de l'appel à sa méthode classFactory()

ModuleNotFoundError: No module named 'packaging'
Traceback (most recent call last):
  File "/Users/morgane/Desktop/QGIS3.8.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 334, in _startPlugin
    plugins[packageName] = package.classFactory(iface)
  File "/Users/morgane/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/SemiAutomaticClassificationPlugin/__init__.py", line 63, in classFactory
    from .semiautomaticclassificationplugin import (
  File "/Users/morgane/Desktop/QGIS3.8.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 737, in _import
    mod = _builtin_import(name, globals, locals, fromlist, level)
  File "/Users/morgane/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/SemiAutomaticClassificationPlugin/semiautomaticclassificationplugin.py", line 46, in
    from .core import config as cfg, util_qgis, util_qt, utils, util_gdal, messages
  File "/Users/morgane/Desktop/QGIS3.8.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 737, in _import
    mod = _builtin_import(name, globals, locals, fromlist, level)
  File "/Users/morgane/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/SemiAutomaticClassificationPlugin/core/utils.py", line 33, in
    from packaging.version import parse
  File "/Users/morgane/Desktop/QGIS3.8.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 737, in _import
    mod = _builtin_import(name, globals, locals, fromlist, level)
ModuleNotFoundError: No module named 'packaging'

Version de Python : 3.6.8 (v3.6.8:3c6b436a57, Dec 24 2018, 02:04:31) [GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.57)]
Version de QGIS : 3.8.1-Zanzibar Zanzibar, exported

Chemin Python :
/Users/morgane/Desktop/QGIS3.8.app/Contents/MacOS/../Resources/python
/Users/morgane/Library/Application Support/QGIS/QGIS3/profiles/default/python
/Users/morgane/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins
/Users/morgane/Desktop/QGIS3.8.app/Contents/MacOS/../Resources/python/plugins
/Library/Frameworks/SQLite3.framework/Versions/E/Python/3.6
/Library/Frameworks/Python.framework/Versions/3.6/lib/python36.zip
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/lib-dynload
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages
/Users/morgane/Library/Application Support/QGIS/QGIS3/profiles/default/python

J'essaie de trouver le dossier qui m'affiche cette erreur mais en vain.
Merci pour votre réponse.