cannot run sip.py

[mrbeezer@gmail.com]

Trying to run sip.py.  Install appeared to be fine.  here is the terminal output.

sudo python sip.py
ALARM from Example_Sender!: Just and example!
plugins loaded:
  mobile_app
  plugin_manager
  signaling_examples
  system_update
zones changed
[0, 0, 0, 0, 0, 0, 0, 0]
 Starting timing loop

http://0.0.0.0:80/
Traceback (most recent call last):
  File "sip.py", line 240, in <module>
    app.run()
  File "sip.py", line 186, in run
    return web.httpserver.runsimple(func, ('0.0.0.0', port))
  File "/home/pi/SIP/web/httpserver.py", line 157, in runsimple
    server.start()
  File "/home/pi/SIP/web/wsgiserver/__init__.py", line 1753, in start
    raise socket.error(msg)
socket.error: No socket could be created

I have tried different ports etc. but I always get this error.  Running on a PI2 with noobs raspbian.