WebUI not responding - Could not set up all dependencies error in log

My HA container has been running for a long time with auto updates. Recently realized that the WebUI is not running. Restarting the container manually shows the following error in the logs

2019-12-04 18:28:06 ERROR (MainThread) [homeassistant.core] Error doing job: Task exception was never retrieved
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/discovery/__init__.py", line 179, in new_service_found
  File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 66, in async_init
    flow = await self._async_create_flow(handler, context=context, data=data)
  File "/usr/src/homeassistant/homeassistant/config_entries.py", line 638, in _async_create_flow
    await async_process_deps_reqs(self.hass, self._hass_config, integration)
  File "/usr/src/homeassistant/homeassistant/setup.py", line 288, in async_process_deps_reqs
    raise HomeAssistantError("Could not set up all dependencies.")
homeassistant.exceptions.HomeAssistantError: Could not set up all dependencies.

Any help on how to fix this?