File "/usr/src/homeassistant/homeassistant/components/sensor/recorder.py", line 798, in list_statistic_ids
entities = _get_sensor_states(hass)
File "/usr/src/homeassistant/homeassistant/components/sensor/recorder.py", line 121, in _get_sensor_states
or try_parse_enum(SensorStateClass, state_class)
~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: unhashable type: 'list'
Seems like I've been getting the above error since late December. The energy dashboard no longer loads, it just gives an "Unknown Error" page.