Core: PLEX: async_call when dispatching 'plex_update_platforms_signal

[Sjeff]

The problem

Plex intergration doesn't load correctly:
Sensor state is Unknown.
Media_player is not being created.

When opening the options of the intergration nothing happens:

Environment

• Home Assistant Core release with the issue: 0.111.0
• Last working Home Assistant Core release (if known): unknown i did not use the plex intergration before
• Operating environment (Home Assistant/Supervised/Docker/venv): Home Assistant Supervised
• Integration causing this issue: Plex Media Server
• Link to integration documentation on our website: https://www.home-assistant.io/integrations/plex/

Problem-relevant configuration.yaml

I used the Integrations page to set up the plex intergration.

Traceback/Error logs

This is the error i see on startup

ERROR (MainThread) [homeassistant.util.logging] Exception in async_call when dispatching 'plex_update_platforms_signal.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx': ()
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/debounce.py", line 60, in async_call
    await self.hass.async_add_job(self.function)  # type: ignore
  File "/usr/src/homeassistant/homeassistant/components/plex/server.py", line 207, in _async_update_platforms
    known_accounts = set(self.option_monitored_users)
  File "/usr/src/homeassistant/homeassistant/components/plex/server.py", line 361, in option_monitored_users
    return self.options[MP_DOMAIN].get(CONF_MONITORED_USERS, {})
KeyError: 'media_player'

another error when opening the options of the intergration:

ERROR (MainThread) [aiohttp.server] Error handling request
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/aiohttp/web_protocol.py", line 418, in start
    resp = await task
  File "/usr/local/lib/python3.7/site-packages/aiohttp/web_app.py", line 458, in _handle
    resp = await handler(request)
  File "/usr/local/lib/python3.7/site-packages/aiohttp/web_middlewares.py", line 119, in impl
    return await handler(request)
  File "/usr/src/homeassistant/homeassistant/components/http/real_ip.py", line 39, in real_ip_middleware
    return await handler(request)
  File "/usr/src/homeassistant/homeassistant/components/http/ban.py", line 73, in ban_middleware
    return await handler(request)
  File "/usr/src/homeassistant/homeassistant/components/http/auth.py", line 127, in auth_middleware
    return await handler(request)
  File "/usr/src/homeassistant/homeassistant/components/http/view.py", line 129, in handle
    result = await result
  File "/usr/src/homeassistant/homeassistant/components/config/config_entries.py", line 186, in post
    return await super().post(request)
  File "/usr/src/homeassistant/homeassistant/components/http/data_validator.py", line 60, in wrapper
    result = await method(view, request, *args, **kwargs)
  File "/usr/src/homeassistant/homeassistant/helpers/data_entry_flow.py", line 73, in post
    "show_advanced_options": data["show_advanced_options"],
  File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 129, in async_init
    flow, flow.init_step, data, init_done
  File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 201, in _async_handle_step
    result: Dict = await getattr(flow, method)(user_input)
  File "/usr/src/homeassistant/homeassistant/components/plex/config_flow.py", line 328, in async_step_init
    return await self.async_step_plex_mp_settings()
  File "/usr/src/homeassistant/homeassistant/components/plex/config_flow.py", line 358, in async_step_plex_mp_settings
    known_accounts = set(plex_server.option_monitored_users)
  File "/usr/src/homeassistant/homeassistant/components/plex/server.py", line 361, in option_monitored_users
    return self.options[MP_DOMAIN].get(CONF_MONITORED_USERS, {})
KeyError: 'media_player'

Additional information

[StevenReitsma]

Wow you were 6 minutes faster! More details: https://github.com/home-assistant/core/issues/36678

[probot-home-assistant[bot]]

plex documentation
plex source
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[probot-home-assistant[bot]]

Hey there @jjlawren, mind taking a look at this issue as its been labeled with a integration (plex) you are listed as a codeowner for? Thanks!
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[jjlawren]

What versions did you both upgrade from?

[Sjeff]

i upgraded from 0.110.7

[StevenReitsma]

Upgraded from 0.110.0 but wasn't using the integration before

[jjlawren]

I'm 99% sure this is fixed in 0.111.2 but please confirm when you have the opportunity.

[StevenReitsma]

Works fine now :) thanks for the quick fix

[iainp999]

Found this when looking for a resolution to the same issue! Thanks everyone, can confirm all good now for me too.

[iainp999]

Hey everyone, sorry for commenting on a closed issue, but seems this has returned for me since upgrading to Home Assistant 0.111.4

2020-06-18 13:59:55 ERROR (MainThread) [homeassistant.components.plex] Login to xxxxxx failed, verify token and SSL settings: [(401) unauthorized; http://192.xx.xx.xx:32400/ <html><head><script>window.location = window.location.href.match(/(^.+\/)[^\/]*$/)[1] + 'web/index.html';</script><title>Unauthorized</title></head><body><h1>401 Unauthorized</h1></body></html>]

And the same issue as original description above.

[jjlawren]

@iainp999 that's a different issue. It means your token is no longer valid. Did you change your Plex password or deauthorize HA?

[iainp999]

Thanks @jjlawren - neither of the above. I did upgrade HA via supervisor, though.

[jjlawren]

Either way the underlying problem is that your token is no longer valid. You'll need to set up the integration again (or manually obtain a new one). I'm working on a way to make this process more seamless but it's not ready yet.

[iainp999]

@jjlawren - thanks again - I think this was my misunderstanding of how the authentication mechanism works.

I have not been able to automatically obtain a token from plex whilst setting up - I allow the app permission but then control never returns to HA. I did try configuring base URL in configuration, but that didn't help.

I had worked around this by grabbing a token from the metadata XML in the plex UI in my browser.

However, that's obviously a hack and the token is associated to the browser.

[jjlawren]

If you're having issues with the UI setup, please open a new issue with the details and I'll do my best to help fix the problem.