how to resolve "[WinError 2] The system cannot find the file specified" while making ROI by SCP

Question

2022-09-06T15:53:28     WARNING    Traceback (most recent call last):
              File "C:/Users/Baghban/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\SemiAutomaticClassificationPlugin\dock\scpdock.py", line 1736, in pointerClickROI
              self.createROI(cfg.pntROI)
              File "C:/Users/Baghban/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\SemiAutomaticClassificationPlugin\dock\scpdock.py", line 2833, in createROI
              o = cfg.utls.multiProcessNoBlocks(rasterPath = tPMD, bandNumberList = bandNumberList2, functionRaster = cfg.utls.regionGrowingAlgMultiprocess, functionBandArgument = functionList, functionVariable = fVarList, progressMessage = cfg.QtWidgetsSCP.QApplication.translate('semiautomaticclassificationplugin', 'Region growing'))
              File "C:/Users/Baghban/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\SemiAutomaticClassificationPlugin\core\utils.py", line 4688, in multiProcessNoBlocks
              cfg.pool = cfg.poolSCP(processes=threadNumber)
              File "C:\PROGRA~1\QGIS3~1.16\apps\Python37\lib\multiprocessing\context.py", line 119, in Pool
              context=self.get_context())
              File "C:\PROGRA~1\QGIS3~1.16\apps\Python37\lib\multiprocessing\pool.py", line 176, in __init__
              self._repopulate_pool()
              File "C:\PROGRA~1\QGIS3~1.16\apps\Python37\lib\multiprocessing\pool.py", line 241, in _repopulate_pool
              w.start()
              File "C:\PROGRA~1\QGIS3~1.16\apps\Python37\lib\multiprocessing\process.py", line 112, in start
              self._popen = self._Popen(self)
              File "C:\PROGRA~1\QGIS3~1.16\apps\Python37\lib\multiprocessing\context.py", line 322, in _Popen
              return Popen(process_obj)
              File "C:\PROGRA~1\QGIS3~1.16\apps\Python37\lib\multiprocessing\popen_spawn_win32.py", line 48, in __init__
              None, None, False, 0, None, None, None)
             FileNotFoundError: [WinError 2] The system cannot find the file specified