Some errors maybe myself problem

[ll104567]

Error getting wireless interface.
Traceback (most recent call last):
File "wifi-users.py", line 161, in
main(argv)
File "wifi-users.py", line 58, in main
wireless = Wireless()
File "/usr/local/lib/python2.7/dist-packages/wireless/Wireless.py", line 27, in init
self._driver_name = self._detectDriver()
File "/usr/local/lib/python2.7/dist-packages/wireless/Wireless.py", line 51, in _detectDriver
response = cmd('nmcli --version')
File "/usr/local/lib/python2.7/dist-packages/wireless/Wireless.py", line 15, in cmd
stderr=subprocess.STDOUT
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe5 in position 6: ordinal not in range(128)