MQTT error in __init__

Traceback (most recent call last):
  File "/usr/src/app/homeassistant/helpers/entity_platform.py", line 350, in _async_add_entity
    await entity.async_added_to_hass()
  File "/usr/src/app/homeassistant/components/mqtt/light/schema_basic.py", line 167, in async_added_to_hass
    await self._subscribe_topics()
  File "/usr/src/app/homeassistant/components/mqtt/light/schema_basic.py", line 470, in _subscribe_topics
    topics)
  File "/usr/src/app/homeassistant/components/mqtt/subscription.py", line 83, in async_subscribe_topics
    await requested.resubscribe_if_necessary(hass, current)
  File "/usr/src/app/homeassistant/components/mqtt/subscription.py", line 44, in resubscribe_if_necessary
    self.qos, self.encoding
  File "/usr/src/app/homeassistant/components/mqtt/__init__.py", line 320, in async_subscribe
    qos, encoding)
  File "/usr/src/app/homeassistant/components/mqtt/__init__.py", line 702, in async_subscribe
    await self._async_perform_subscription(topic, qos)
  File "/usr/src/app/homeassistant/components/mqtt/__init__.py", line 737, in _async_perform_subscription
    _raise_on_error(result)
  File "/usr/src/app/homeassistant/components/mqtt/__init__.py", line 822, in _raise_on_error
    'Error talking to MQTT: {}'.format(mqtt.error_string(result_code)))
homeassistant.exceptions.HomeAssistantError: Error talking to MQTT: The client is not currently connected.