Mosquito won’t start

When I hit start, it spins for a bit then doesn’t do anything. Are there logs somewhere so I can see what’s going on?

This is the configuration on the add on.

  "plain": true,
  "plain_websockets": false,
  "ssl": false,
  "ssl_websockets": false,
  "anonymous": true,
  "logins": [
      "username": "testuser",
      "password": "mypw"
  "customize": {
    "active": false,
    "folder": "mosquitto"
  "certfile": "fullchain.pem",
  "keyfile": "privkey.pem"

And in the yaml

  broker: core-mosquitto
  username: testuser
  password: mypw

Found the log

2018-07-15 07:03:14 ERROR (MainThread) [homeassistant.components.mqtt] Failed to connect due to exception: [Errno -2] Name does not resolve
2018-07-15 07:03:14 ERROR (MainThread) [homeassistant.setup] Setup failed for mqtt: Component failed to initialize.
2018-07-15 07:03:34 WARNING (MainThread) [homeassistant.setup] Setup of config is taking over 10 seconds.
2018-07-15 07:03:43 WARNING (MainThread) [homeassistant.setup] Setup of isy994 is taking over 10 seconds.
2018-07-15 07:03:52 ERROR (SyncWorker_8) [homeassistant.components.device_tracker.icloud] Multiple devices with name: denafeldmansmacbook
2018-07-15 07:04:13 ERROR (MainThread) [homeassistant.core] Error doing job: Task exception was never retrieved
Traceback (most recent call last):
File “/usr/lib/python3.6/site-packages/homeassistant/helpers/”, line 326, in _async_add_entity
await entity.async_update_ha_state()
File “/usr/lib/python3.6/site-packages/homeassistant/helpers/”, line 207, in async_update_ha_state
state = self.state
File “/usr/lib/python3.6/site-packages/homeassistant/components/”, line 475, in state
return super().state
File “/usr/lib/python3.6/site-packages/homeassistant/helpers/”, line 370, in state
return STATE_ON if self.is_on else STATE_OFF
File “/usr/lib/python3.6/site-packages/homeassistant/components/light/”, line 34, in is_on
return self.value > 0
TypeError: ‘>’ not supported between instances of ‘NoneType’ and ‘int’