Semi-Automatic Classification PlugIN

Hi there,
I try to use the Semi-Automatic Classification Plugin with QGIS 3.10 on my Mac. (MacOS 10.13).
When I launch “calcul de bande” I have this error.
Can you help me please ?

Thanks
Olivier

==========

2020-11-30T12:42:37 WARNING Traceback (most recent call last):
File “/Users/olivier/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/SemiAutomaticClassificationPlugin/maininterface/landsatTab.py”, line 640, in performLandsatCorrection
self.landsat(cfg.ui.label_26.text(), o)
File “/Users/olivier/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/SemiAutomaticClassificationPlugin/maininterface/landsatTab.py”, line 331, in landsat
LDNmList = cfg.utls.findDNmin(tPMDN, NoData)
File “/Users/olivier/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/SemiAutomaticClassificationPlugin/core/utils.py”, line 2047, in findDNmin
o = cfg.utls.multiProcessRaster(rasterPath = inputRaster, functionBand = ‘No’, functionRaster = cfg.utls.rasterUniqueValuesWithSum, nodataValue = noDataVal, progressMessage = cfg.QtWidgetsSCP.QApplication.translate(‘semiautomaticclassificationplugin’, ‘DOS1 calculation’), deleteArray = ‘No’, parallel = cfg.parallelArray)
File “/Users/olivier/Library/Application Support/QGIS/QGIS3/profiles/default/python/plugins/SemiAutomaticClassificationPlugin/core/utils.py”, line 4824, in multiProcessRaster
manager = cfg.MultiManagerSCP()
File “/Applications/QGIS3.10.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python3.7/multiprocessing/context.py”, line 56, in Manager
m.start()
File “/Applications/QGIS3.10.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python3.7/multiprocessing/managers.py”, line 547, in start
self._address = reader.recv()
File “/Applications/QGIS3.10.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python3.7/multiprocessing/connection.py”, line 250, in recv
buf = self._recv_bytes()
File “/Applications/QGIS3.10.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python3.7/multiprocessing/connection.py”, line 407, in _recv_bytes
buf = self._recv(4)
File “/Applications/QGIS3.10.app/Contents/Frameworks/Python.framework/Versions/Current/lib/python3.7/multiprocessing/connection.py”, line 383, in _recv
raise EOFError
EOFError