QGIS » QGIS Application

Hi,

Each time I want run any Grass algorithm fromprocessing toolbox, I have this kind of error:
<pre>
Traceback &quot;Traceback (most recent call last):
File "C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Algorithm.py", line 411, in processAlgorithm
Grass7Utils.executeGrass(self.commands, feedback, self.outputCommands)
File "C:/OSGEO4~1/apps/qgis/./python/plugins\processing\algs\grass7\Grass7Utils.py", line 369, in executeGrass
for line in iter(proc.stdout.readline, ''):
File "C:\OSGEO4~1\apps\Python37\lib\codecs.py", line 322, in decode
(result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb3 in position 50: invalid start byte
</pre> byte&quot;

0xb3 is polish ł letter, but I don't know which data are read on this level...