[139698485440000] Error handling message: Unknown error (unknown_error) about hass_nuki_ng HOT 3 OPEN

2022-11-05 15:48:26.635 WARNING (MainThread) [custom_components.nuki_ng.nuki] Despite being configured, Web API request has failed
2022-11-05 15:48:26.637 ERROR (MainThread) [custom_components.nuki_ng.nuki] Error while fetching last log entry
Traceback (most recent call last):
  File "/config/custom_components/nuki_ng/nuki.py", line 423, in _update
    item["last_log"] = await self.api.web_get_last_unlock_log(web_id)
  File "/config/custom_components/nuki_ng/nuki.py", line 200, in web_get_last_unlock_log
    response = await self.web_async_json(
  File "/config/custom_components/nuki_ng/nuki.py", line 184, in web_async_json
    return await self.async_json(
  File "/config/custom_components/nuki_ng/nuki.py", line 39, in async_json
    raise ConnectionError(f"Http response for {response.request.url}: {response.status_code} {response.reason}")
ConnectionError: Http response for https://api.nuki.io/smartlock/17987331556/log: 500 Server Error
2022-11-05 15:48:26.640 ERROR (MainThread) [homeassistant] Error doing job: Task exception was never retrieved
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 151, in _handle_refresh_interval
    await self._async_refresh(log_failures=True, scheduled=True)
  File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 283, in _async_refresh
    self.async_update_listeners()
  File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 110, in async_update_listeners
    update_callback()
  File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 348, in _handle_coordinator_update
    self.async_write_ha_state()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 545, in async_write_ha_state
    self._async_write_ha_state()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 586, in _async_write_ha_state
    attr.update(self.extra_state_attributes or {})
  File "/config/custom_components/nuki_ng/sensor.py", line 220, in extra_state_attributes
    "timestamp": datetime.fromisoformat(timestamp) if not None else None,
TypeError: fromisoformat: argument must be str