Error during setup of component discovery

I do not fine here how to resolve it, so any help will be nice.
i get this error every time

Invalid config
The following components and platforms could not be set up:


Please check your config

The log

2017-09-28 22:19:33 ERROR (MainThread) [homeassistant.setup] Error during setup of component discovery
Traceback (most recent call last):
  File "/srv/homeassistant/lib/python3.4/site-packages/homeassistant/", line 191, in _async_setup_component
    result = yield from component.async_setup(hass, processed_config)
  File "/usr/lib/python3.4/asyncio/", line 141, in coro
    res = func(*args, **kw)
  File "/srv/homeassistant/lib/python3.4/site-packages/homeassistant/components/", line 82,	 in async_setup
    from netdisco.discovery import NetworkDiscovery
  File "/srv/homeassistant/lib/python3.4/site-packages/netdisco/", line 6, in <module>

any one? :frowning: Thanks!

Try installing netdisco manually

pip3 install netdisco==1.2.0

same :frowning: issue

any one? still same issue