QGIS » QGIS Application

A Python error occurs running the Make Valid LWGEOM algorithm in QGIS 2.8.3 processing toolbox:

Errore durante l'esecuzione di codice Python:

Traceback (most recent call last):
File "C:/Users/Angelo/.qgis2/python/plugins\\processing\\gui\\AlgorithmDialog.py", line 200, in accept
if runalg(self.alg, self):
File "C:/Users/Angelo/.qgis2/python/plugins\\processing\\gui\\AlgorithmExecutor.py", line 51, in runalg
alg.execute(progress)
File "C:/Users/Angelo/.qgis2/python/plugins\\processing\\core\\GeoAlgorithm.py", line 248, in execute
str(e) + self.tr('\
See log for more details'))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe8 in position 19: ordinal not in range(128)

Versione Python:
2.7.5 (default, May 15 2013, 22:44:16) [MSC v.1500 64 bit (AMD64)]

Versione di QGIS:
2.8.3-Wien Wien, 313a6bc

Percorso Python: ['C:/Users/Angelo/.qgis2/python/plugins\\\\processinglwgeomprovider', 'C:/Users/Angelo/.qgis2/python/plugins\\\\processing', 'C:/PROGRA~1/QGISWI~1/apps/qgis-ltr/./python', u'C:/Users/Angelo/.qgis2/python', u'C:/Users/Angelo/.qgis2/python/plugins', 'C:/PROGRA~1/QGISWI~1/apps/qgis-ltr/./python/plugins', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\matplotlib-1.3.1-py2.7-win-amd64.egg', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\
ose-1.3.3-py2.7.egg', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\tornado-4.0.1-py2.7-win-amd64.egg', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\backports.ssl_match_hostname-3.4.0.2-py2.7.egg', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\certifi-14.05.14-py2.7.egg', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\bin\\\\python27.zip', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\DLLs', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\plat-win', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\lib-tk', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\bin', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\PIL', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\jinja2-2.7.2-py2.7.egg', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\markupsafe-0.23-py2.7-win-amd64.egg', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\pytz-2012j-py2.7.egg', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\win32', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\win32\\\\lib', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\Pythonwin', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\Shapely-1.2.18-py2.7-win-amd64.egg', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\six-1.3.0-py2.7.egg', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\wx-2.8-msw-unicode', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\xlrd-0.9.2-py2.7.egg', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\Python27\\\\lib\\\\site-packages\\\\xlwt-0.7.5-py2.7.egg', u'C:/Users/Angelo/.qgis2//python', 'C:\\\\Users\\\\Angelo\\\\.qgis2\\\\python\\\\plugins\\\\mmqgis/forms', 'C:\\\\PROGRA~1\\\\QGISWI~1\\\\apps\\\\qgis-ltr\\\\python\\\\plugins\\\\fTools\\\\tools']

What could be the origin of the issue and its solution?