When save button click, cant generate xml

[vikher]

Hello
Everytime i click the save button i get this error log in the terminal

labelImg.py:435: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
if filename in self.recentFiles:
Traceback (most recent call last):
File "labelImg.py", line 905, in saveFile
if self.defaultSaveDir is not None and len(str(self.defaultSaveDir)):
UnicodeEncodeError: 'ascii' codec can't encode character u'\xe1' in position 22: ordinal not in range(128)

Please help, thanks in advance