Error installing UMEP

[TigerMINATO]

I can download UMEP, but I can't load it in QGIS, so I can't use it.
My QGIS version is 3.14, and my operating system is Windows 10.
Here's the error.

classFactory（）Unable to load plugin 'UMEP' due to error during method invocation

ModuleNotFoundError: No module named 'packaging'
Traceback (most recent call last):
File "C:/PROGRA1/QGIS31.14/apps/qgis/./python\qgis\utils.py", line 334, in startPlugin
plugins[packageName] = package.classFactory(iface)
File "C:/Users/nami2/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\UMEP_init.py", line 34, in classFactory
from .UMEP import UMEP
File "C:/PROGRA1/QGIS31.14/apps/qgis/./python\qgis\utils.py", line 743, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
File "C:/Users/nami2/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\UMEP\UMEP.py", line 50, in
from .SuewsSimple.suews_simple import SuewsSimple
File "C:/PROGRA1/QGIS31.14/apps/qgis/./python\qgis\utils.py", line 743, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
File "C:/Users/nami2/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\UMEP\SuewsSimple\suews_simple.py", line 35, in
from ..suewsmodel import suews_wrapper
File "C:/PROGRA1/QGIS31.14/apps/qgis/./python\qgis\utils.py", line 743, in _import
mod = builtin_import(name, globals, locals, fromlist, level)
File "C:/Users/nami2/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\UMEP\suewsmodel_init.py", line 5, in
from .supy_installer import setup_supy
File "C:/PROGRA1/QGIS31.14/apps/qgis/./python\qgis\utils.py", line 743, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
File "C:/Users/nami2/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\UMEP\suewsmodel\supy_installer.py", line 4, in
from packaging import version
File "C:/PROGRA1/QGIS31.14/apps/qgis/./python\qgis\utils.py", line 743, in _import
mod = _builtin_import(name, globals, locals, fromlist, level)
ModuleNotFoundError: No module named 'packaging'

Pythonバージョン: 3.7.0 (v3.7.0:1bf9cc5093, Jun 27 2018, 04:59:51) [MSC v.1914 64 bit (AMD64)]
QGISバージョン: 3.14.1-Pi Pi, de08d6b71d

Pythonパス:
C:/PROGRA1/QGIS31.14/apps/qgis/./python
C:/Users/nami2/AppData/Roaming/QGIS/QGIS3\profiles\default/python
C:/Users/nami2/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins
C:/PROGRA1/QGIS31.14/apps/qgis/./python/plugins
C:\PROGRA1\QGIS31.14\apps\Python37
C:\PROGRA1\QGIS31.14\apps\Python37\Scripts
C:\Program Files\QGIS 3.14\bin\python37.zip
C:\PROGRA1\QGIS31.14\apps\Python37\DLLs
C:\PROGRA1\QGIS31.14\apps\Python37\lib
C:\Program Files\QGIS 3.14\bin
C:\PROGRA1\QGIS31.14\apps\Python37\lib\site-packages
C:\PROGRA1\QGIS31.14\apps\Python37\lib\site-packages\win32
C:\PROGRA1\QGIS31.14\apps\Python37\lib\site-packages\win32\lib
C:\PROGRA1\QGIS31.14\apps\Python37\lib\site-packages\Pythonwin
C:/Users/nami2/AppData/Roaming/QGIS/QGIS3\profiles\default/python

[biglimp]

I think this is because there is a transisition between versions in QGIS and Python. Try to install the module packaging manually, using the command pip install packaging in the OSGeo4W shell. Details can be found in our manual: https://umep-docs.readthedocs.io/en/latest/Getting_Started.html#adding-missing-python-libraries-and-other-osgeo-functionalities. If this also fails, install latest version of QGIS and make sure to uninstall previous versions.

[TigerMINATO]

Sorry for the late reply.
I did as you said, but I could not load UMEP.

[biglimp]

So what is the error message now?

[TigerMINATO]

I got the same error as what I wrote above.
After updating my GIS to the latest version, I was able to install UMEP on it.
Thank you very much.