HA crashes: Error doing job: Task exception was never retrieved

In my log I see the following error:

Error doing job: Task exception was never retrieved
Traceback (most recent call last):
File “/srv/homeassistant/lib/python3.6/site-packages/homeassistant/helpers/entity_component.py”, line 226, in async_setup_platform
self.hass, self.config, self.domain, platform_type
File “/srv/homeassistant/lib/python3.6/site-packages/homeassistant/setup.py”, line 227, in async_prepare_setup_platform
integration = await loader.async_get_integration(hass, platform_name)
File “/srv/homeassistant/lib/python3.6/site-packages/homeassistant/loader.py”, line 278, in async_get_integration
Integration.resolve_from_root, hass, components, domain
File “/usr/lib/python3.6/concurrent/futures/thread.py”, line 56, in run
result = self.fn(*self.args, **self.kwargs)
File “/srv/homeassistant/lib/python3.6/site-packages/homeassistant/loader.py”, line 154, in resolve_from_root
manifest_path = pathlib.Path(base) / domain / “manifest.json”
File “/usr/lib/python3.6/pathlib.py”, line 899, in truediv
return self._make_child((key,))
File “/usr/lib/python3.6/pathlib.py”, line 686, in _make_child
drv, root, parts = self._parse_args(args)
File “/usr/lib/python3.6/pathlib.py”, line 640, in _parse_args
a = os.fspath(a)
TypeError: expected str, bytes or os.PathLike object, not NoneType

Sometimes HA crashes. It looks like it started after installing a custom component. But now after deleting that component the error still shows and HA keeps crashing.

It looks like an issue with the manifest.json, but is doesnt say in which folder or component.

Latest installed component: https://www.home-assistant.io/components/postnl
With these config for custom_components:
For this lovelace card: Lovelace: PostNL (includes custom_component content)

Any help is appreciated.

My setup: HA v99.3 on python venv on Ubuntu 19.4

same problem =(

I am getting the same error when I reboot HA. But HA starting without any problem.

I’ve added some logging in the loader.py and the error occures when the 17track integration is loaded. But the integration ist working without any problem and the manifest.json is in the correct folder.

Same issue.

Maybe this is the reason of the issue, hope to help you.
https://community.home-assistant.io/t/error-doing-job/154622/2