problem after upgrade to new verion

[Darek]

Hi,
I've just upgraded to the newest SIP version and I have the following problem:

Traceback (most recent call last):
  File "sip.py", line 334, in <module>
    app.run()
  File "sip.py", line 253, in run
    return web.httpserver.runsimple(func, (ip, port))
  File "/home/pi/SIP/web/httpserver.py", line 167, in runsimple
    server = WSGIServer(server_address, func)
  File "/home/pi/SIP/web/httpserver.py", line 188, in WSGIServer
    from cheroot import wsgi
  File "/home/pi/SIP/cheroot/wsgi.py", line 33, in <module>
    import six
ImportError: bad magic number in 'six': b'\x03\xf3\r\n'
SSD1306 plugin: active

Any Help ?