[Qgis-user] couldn't load plugin 'processing' after update to 'Zurich'

[Wouter Impens]

Hi List,

After updating there seems to be a problem loading the processing toolbox,
Ik get this error message:

Couldn't load plugin 'processing' due to an error when calling its
classFactory() method
ModuleNotFoundError: No module named 'yaml'

Traceback (most recent call last):
  File "C:/OSGEO4~1/apps/qgis/./python\qgis\utils.py", line 335, in _startPlugin
    plugins[packageName] = package.classFactory(iface)
  File "C:/OSGEO4~1/apps/qgis/./python/plugins\processing\__init__.py",
line 50, in classFactory
    from processing.ProcessingPlugin import ProcessingPlugin
  File "C:/OSGEO4~1/apps/qgis/./python\qgis\utils.py", line 798, in _import
    mod = _builtin_import(name, globals, locals, fromlist, level)
  File "C:/OSGEO4~1/apps/qgis/./python/plugins\processing\ProcessingPlugin.py",
line 47, in
    from processing.gui.HistoryDialog import HistoryDialog
  File "C:/OSGEO4~1/apps/qgis/./python\qgis\utils.py", line 798, in _import
    mod = _builtin_import(name, globals, locals, fromlist, level)
  File "C:/OSGEO4~1/apps/qgis/./python/plugins\processing\gui\HistoryDialog.py",
line 33, in
    from processing.gui import TestTools
  File "C:/OSGEO4~1/apps/qgis/./python\qgis\utils.py", line 798, in _import
    mod = _builtin_import(name, globals, locals, fromlist, level)
  File "C:/OSGEO4~1/apps/qgis/./python/plugins\processing\gui\TestTools.py",
line 27, in
    import yaml
  File "C:/OSGEO4~1/apps/qgis/./python\qgis\utils.py", line 798, in _import
    mod = _builtin_import(name, globals, locals, fromlist, level)
ModuleNotFoundError: No module named 'yaml'


Python version: 3.9.0 (tags/v3.9.0:9cf6752, Oct  5 2020, 15:34:40) [MSC
v.1927 64 bit (AMD64)]
QGIS version: 3.18.0-Zürich Zürich, bdef9fb3
Python Path:

   - C:/OSGEO4~1/apps/qgis/./python
   - C:/Users/d08909/AppData/Roaming/QGIS/QGIS3\profiles\default/python
   -
   C:/Users/d08909/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins
   - C:/OSGEO4~1/apps/qgis/./python/plugins
   - C:\OSGeo4W64\bin\python39.zip
   - C:\OSGEO4~1\apps\Python39\DLLs
   - C:\OSGEO4~1\apps\Python39\lib
   - C:\OSGeo4W64\bin
   - C:\OSGEO4~1\apps\Python39
   - C:\OSGEO4~1\apps\Python39\lib\site-packages
   - C:\OSGEO4~1\apps\Python39\lib\site-packages\win32
   - C:\OSGEO4~1\apps\Python39\lib\site-packages\win32\lib
   - C:\OSGEO4~1\apps\Python39\lib\site-packages\Pythonwin
   - C:/Users/d08909/AppData/Roaming/QGIS/QGIS3\profiles\default/python
   -
   C:\Users\d08909\AppData\Roaming\QGIS\QGIS3\profiles\default\python\plugins\kmltools\libs
   -
   C:/Users/d08909/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\qgis2web
   -
   C:\Users\d08909\AppData\Roaming\QGIS\QGIS3\profiles\default\python\plugins
   - .

Ik updated using the osgeo4w-setup.exe
I'm using windows 10

Thanks!

Wouter Impens
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