Pushbullet problem - notify component doesn't seem to start?

Hi everyone,

I’m having trouble getting Pushbullet set up. I’m running version 0.73.1 (Hassbian). The notify component doesn’t show up in the Dev Tools > Services list. The error I see in the log is:-

2018-07-11 17:11:04 ERROR (MainThread) [homeassistant.core] Error doing job: Task exception was never retrieved
Traceback (most recent call last):
File “/usr/lib/python3.5/asyncio/tasks.py”, line 241, in _step
result = coro.throw(exc)
File “/srv/homeassistant/lib/python3.5/site-packages/homeassistant/setup.py”, line 56, in async_setup_component
return await task
File “/usr/lib/python3.5/asyncio/futures.py”, line 380, in iter
yield self # This tells Task to wait for completion.
File “/usr/lib/python3.5/asyncio/tasks.py”, line 304, in _wakeup
future.result()
File “/usr/lib/python3.5/asyncio/futures.py”, line 293, in result
raise self._exception
File “/usr/lib/python3.5/asyncio/tasks.py”, line 239, in _step
result = coro.send(None)
File “/srv/homeassistant/lib/python3.5/site-packages/homeassistant/setup.py”, line 116, in _async_setup_component
conf_util.async_process_component_config(hass, config, domain)
File “/srv/homeassistant/lib/python3.5/site-packages/homeassistant/config.py”, line 673, in async_process_component_config
platform = get_platform(hass, domain, p_name)
File “/srv/homeassistant/lib/python3.5/site-packages/homeassistant/loader.py”, line 58, in get_platform
return get_component(hass, PLATFORM_FORMAT.format(domain, platform))
File “/srv/homeassistant/lib/python3.5/site-packages/homeassistant/loader.py”, line 86, in get_component
module = importlib.import_module(path)
File “/usr/lib/python3.5/importlib/init.py”, line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File “”, line 986, in _gcd_import
File “”, line 969, in _find_and_load
File “”, line 958, in _find_and_load_unlocked
File “”, line 673, in _load_unlocked
File “”, line 669, in exec_module
File “”, line 775, in get_code
File “”, line 735, in source_to_code
File “”, line 222, in _call_with_frames_removed
File “/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/notify/pushbullet.py”, line 7

I’m really not sure what it means though. I’ve tried manually uninstalling and reinstalling pushbullet.py, but no difference.

Anyone have any ideas? Thanks