Error doing job:?

Configuration
1

I keep geting this error not sure if is effecting anything.

But had it with 0.102.3 and now with 0.103.

Not sure where to start looking for the problem.

2019-12-12 16:08:13 ERROR (MainThread) [homeassistant.core] Error doing job: Task exception was never retrieved
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/entity_component.py", line 218, in async_setup_platform
    self.hass, self.config, self.domain, platform_type
  File "/usr/src/homeassistant/homeassistant/setup.py", line 231, in async_prepare_setup_platform
    integration = await loader.async_get_integration(hass, platform_name)
  File "/usr/src/homeassistant/homeassistant/loader.py", line 278, in async_get_integration
    Integration.resolve_from_root, hass, components, domain
  File "/usr/local/lib/python3.7/concurrent/futures/thread.py", line 57, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/src/homeassistant/homeassistant/loader.py", line 154, in resolve_from_root
    manifest_path = pathlib.Path(base) / domain / "manifest.json"
  File "/usr/local/lib/python3.7/pathlib.py", line 908, in __truediv__
    return self._make_child((key,))
  File "/usr/local/lib/python3.7/pathlib.py", line 695, in _make_child
    drv, root, parts = self._parse_args(args)
  File "/usr/local/lib/python3.7/pathlib.py", line 649, in _parse_args
    a = os.fspath(a)
TypeError: expected str, bytes or os.PathLike object, not NoneType
2

Same issue in my custom components.
I found if you called EntityComponent.async_setup during the setup of integration, the configuration of the domain must be:

domain:
  - platform: platform_type
    ......
  - platform: platform_type
    ......

Otherwise, the system will take None as the platform_type, then raise the exception.

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