qgis-dev-full: Couldn't load plugin 'processing' - Couldn't load plugin 'grassprovider'

[andreaerdna]

Launching QGIS Desktop 3.25.0 (Nigthly) (after installing qgis-dev-full 3.25.0-232-5e142c8933-1 with all the dependent packages) the Processing and the GRASS Provider plugins cannot work and the following errors are displayed and reported in the Log Messages Panel:

2022-05-09T15:20:43     WARNING    Python error : Couldn't load plugin 'grassprovider' due to an error when calling its classFactory() method See message log (Python Error) for more details.
2022-05-09T15:20:45     WARNING    Python error : Couldn't load plugin 'processing' See message log (Python Error) for more details.

2022-05-09T15:20:43     CRITICAL    Traceback (most recent call last):
              File "C:\OSA194~1\apps\gdal-dev\lib\site-packages\osgeo\__init__.py", line 30, in swig_import_helper
              return importlib.import_module(mname)
              File "C:\OSA194~1\apps\Python39\lib\importlib\__init__.py", line 127, in import_module
              return _bootstrap._gcd_import(name[level:], package, level)
              File "", line 1030, in _gcd_import
              File "", line 1007, in _find_and_load
              File "", line 986, in _find_and_load_unlocked
              File "", line 666, in _load_unlocked
              File "", line 565, in module_from_spec
              File "", line 1173, in create_module
              File "", line 228, in _call_with_frames_removed
             ImportError: DLL load failed while importing _gdal: Impossibile trovare il modulo specificato.
             
             During handling of the above exception, another exception occurred:
             
             Traceback (most recent call last):
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 423, in _startPlugin
              plugins[packageName] = package.classFactory(iface)
              File "C:\OSA194~1/apps/qgis-dev/./python/plugins\grassprovider\__init__.py", line 26, in classFactory
              from grassprovider.GrassProviderPlugin import GrassProviderPlugin
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 888, in _import
              mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\OSA194~1/apps/qgis-dev/./python/plugins\grassprovider\GrassProviderPlugin.py", line 28, in 
              from grassprovider.Grass7AlgorithmProvider import Grass7AlgorithmProvider
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 888, in _import
              mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\OSA194~1/apps/qgis-dev/./python/plugins\grassprovider\Grass7AlgorithmProvider.py", line 33, in 
              from processing.core.ProcessingConfig import (ProcessingConfig, Setting)
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 888, in _import
              mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\OSA194~1/apps/qgis-dev/./python/plugins\processing\__init__.py", line 26, in 
              from processing.tools.general import * # NOQA
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 888, in _import
              mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\OSA194~1/apps/qgis-dev/./python/plugins\processing\tools\general.py", line 32, in 
              from processing.core.Processing import Processing
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 888, in _import
              mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\OSA194~1/apps/qgis-dev/./python/plugins\processing\core\Processing.py", line 58, in 
              from processing.algs.qgis.QgisAlgorithmProvider import QgisAlgorithmProvider # NOQA
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 888, in _import
              mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\OSA194~1/apps/qgis-dev/./python/plugins\processing\algs\qgis\QgisAlgorithmProvider.py", line 49, in 
              from .HypsometricCurves import HypsometricCurves
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 888, in _import
              mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\OSA194~1/apps/qgis-dev/./python/plugins\processing\algs\qgis\HypsometricCurves.py", line 27, in 
              from osgeo import gdal, ogr, osr
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 888, in _import
              mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\OSA194~1\apps\gdal-dev\lib\site-packages\osgeo\__init__.py", line 46, in 
              _gdal = swig_import_helper()
              File "C:\OSA194~1\apps\gdal-dev\lib\site-packages\osgeo\__init__.py", line 42, in swig_import_helper
              raise ImportError(traceback_string + '\n' + msg)
             ImportError: Traceback (most recent call last):
              File "C:\OSA194~1\apps\gdal-dev\lib\site-packages\osgeo\__init__.py", line 30, in swig_import_helper
              return importlib.import_module(mname)
              File "C:\OSA194~1\apps\Python39\lib\importlib\__init__.py", line 127, in import_module
              return _bootstrap._gcd_import(name[level:], package, level)
              File "", line 1030, in _gcd_import
              File "", line 1007, in _find_and_load
              File "", line 986, in _find_and_load_unlocked
              File "", line 666, in _load_unlocked
              File "", line 565, in module_from_spec
              File "", line 1173, in create_module
              File "", line 228, in _call_with_frames_removed
             ImportError: DLL load failed while importing _gdal: Impossibile trovare il modulo specificato.
             
             On Windows, with Python >= 3.8, DLLs are no longer imported from the PATH.
             If gdalXXX.dll is in the PATH, then set the USE_PATH_FOR_GDAL_PYTHON=YES environment variable
             to feed the PATH into os.add_dll_directory().
             
2022-05-09T15:20:45     CRITICAL    Traceback (most recent call last):
              File "C:\OSA194~1\apps\gdal-dev\lib\site-packages\osgeo\__init__.py", line 30, in swig_import_helper
              return importlib.import_module(mname)
              File "C:\OSA194~1\apps\Python39\lib\importlib\__init__.py", line 127, in import_module
              return _bootstrap._gcd_import(name[level:], package, level)
              File "", line 1030, in _gcd_import
              File "", line 1007, in _find_and_load
              File "", line 986, in _find_and_load_unlocked
              File "", line 666, in _load_unlocked
              File "", line 565, in module_from_spec
              File "", line 1173, in create_module
              File "", line 228, in _call_with_frames_removed
             ImportError: DLL load failed while importing _gdal: Impossibile trovare il modulo specificato.
             
             During handling of the above exception, another exception occurred:
             
             Traceback (most recent call last):
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 401, in loadPlugin
              __import__(packageName)
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 888, in _import
              mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\OSA194~1/apps/qgis-dev/./python/plugins\processing\__init__.py", line 26, in 
              from processing.tools.general import * # NOQA
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 888, in _import
              mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\OSA194~1/apps/qgis-dev/./python/plugins\processing\tools\general.py", line 32, in 
              from processing.core.Processing import Processing
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 888, in _import
              mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\OSA194~1/apps/qgis-dev/./python/plugins\processing\core\Processing.py", line 58, in 
              from processing.algs.qgis.QgisAlgorithmProvider import QgisAlgorithmProvider # NOQA
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 888, in _import
              mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\OSA194~1/apps/qgis-dev/./python/plugins\processing\algs\qgis\QgisAlgorithmProvider.py", line 49, in 
              from .HypsometricCurves import HypsometricCurves
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 888, in _import
              mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\OSA194~1/apps/qgis-dev/./python/plugins\processing\algs\qgis\HypsometricCurves.py", line 27, in 
              from osgeo import gdal, ogr, osr
              File "C:\OSA194~1/apps/qgis-dev/./python\qgis\utils.py", line 888, in _import
              mod = _builtin_import(name, globals, locals, fromlist, level)
              File "C:\OSA194~1\apps\gdal-dev\lib\site-packages\osgeo\__init__.py", line 46, in 
              _gdal = swig_import_helper()
              File "C:\OSA194~1\apps\gdal-dev\lib\site-packages\osgeo\__init__.py", line 42, in swig_import_helper
              raise ImportError(traceback_string + '\n' + msg)
             ImportError: Traceback (most recent call last):
              File "C:\OSA194~1\apps\gdal-dev\lib\site-packages\osgeo\__init__.py", line 30, in swig_import_helper
              return importlib.import_module(mname)
              File "C:\OSA194~1\apps\Python39\lib\importlib\__init__.py", line 127, in import_module
              return _bootstrap._gcd_import(name[level:], package, level)
              File "", line 1030, in _gcd_import
              File "", line 1007, in _find_and_load
              File "", line 986, in _find_and_load_unlocked
              File "", line 666, in _load_unlocked
              File "", line 565, in module_from_spec
              File "", line 1173, in create_module
              File "", line 228, in _call_with_frames_removed
             ImportError: DLL load failed while importing _gdal: Impossibile trovare il modulo specificato.
             
             On Windows, with Python >= 3.8, DLLs are no longer imported from the PATH.
             If gdalXXX.dll is in the PATH, then set the USE_PATH_FOR_GDAL_PYTHON=YES environment variable
             to feed the PATH into os.add_dll_directory().

[jef]

Fixed in ​https://github.com/jef-n/OSGeo4W/commit/34d1b4e5eac21b9c733eda362b7303d54c3294af