The user is using the AUPU奥普 S2-Air device, which includes a human presence sensor. However, this sensor is not exposed separately and cannot be used for additional automation in Home Assistant. To resolve this issue, the user should check the device's configuration and ensure that the sensor is properly integrated with Home Assistant. The user can try restarting the device and Home Assistant, and also check the system logs for any errors. If the issue persists, the user can try updating the Xiaomi Home Integration to the latest version. In addition, the user can also try using other automation tools, such as IFTTT or Zapier, to integrate the sensor with other smart devices.