TypeError when updating about ha_toyota HOT 2 CLOSED

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 134, in _handle_refresh_interval
    await self._async_refresh(log_failures=True, scheduled=True)
  File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 265, in _async_refresh
    update_callback()
  File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 325, in _handle_coordinator_update
    self.async_write_ha_state()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 486, in async_write_ha_state
    self._async_write_ha_state()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 519, in _async_write_ha_state
    state = self._stringify_state()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 492, in _stringify_state
    if (state := self.state) is None:
  File "/usr/src/homeassistant/homeassistant/components/device_tracker/config_entry.py", line 109, in state
    if self.latitude is not None and self.longitude is not None:
  File "/config/custom_components/toyota/device_tracker.py", line 34, in latitude
    parking = self.coordinator.data[self.index].parking
TypeError: 'NoneType' object is not subscriptable