Here is the error
2017-08-12 17:32:56 ERROR (MainThread) [homeassistant.core] Error doing job: Task exception was never retrieved Traceback (most recent call last): File "/usr/lib/python3.4/asyncio/tasks.py", line 233, in _step result = coro.throw(exc) File "/srv/homeassistant/homeassistant_venv/lib/python3.4/site-packages/homeassistant/core.py", line 1025, in _event_to_service_call yield from service_handler.func(service_call) File "/srv/homeassistant/homeassistant_venv/lib/python3.4/site-packages/homeassistant/components/notify/__init__.py", line 138, in async_notify_message yield from notify_service.async_send_message(**kwargs) File "/usr/lib/python3.4/asyncio/futures.py", line 388, in __iter__ yield self # This tells Task to wait for completion. File "/usr/lib/python3.4/asyncio/tasks.py", line 286, in _wakeup value = future.result() File "/usr/lib/python3.4/asyncio/futures.py", line 277, in result raise self._exception File "/usr/lib/python3.4/concurrent/futures/thread.py", line 54, in run result = self.fn(*self.args, **self.kwargs) File "/srv/homeassistant/homeassistant_venv/lib/python3.4/site-packages/homeassistant/components/notify/pushbullet.py", line 94, in send_message if self.hass.config.is_allowed_path(filepath): File "/srv/homeassistant/homeassistant_venv/lib/python3.4/site-packages/homeassistant/core.py", line 1082, in is_allowed_path parent = pathlib.Path(path).parent File "/usr/lib/python3.4/pathlib.py", line 911, in __new__ self = cls._from_parts(args, init=False) File "/usr/lib/python3.4/pathlib.py", line 590, in _from_parts drv, root, parts = self._parse_args(args) File "/usr/lib/python3.4/pathlib.py", line 582, in _parse_args % type(a)) TypeError: argument should be a path or str object, not <class 'NoneType'>
Edit: Downgrade to 0.50.2 fixed the issue
+1 same issue.