Check Sensor Logs
The sensor log file is located at the following location by default:
/usr/local/qualys/sensor/data/logs/qpa.log
If you are running a sensor without persistent storage by using the argument "--sensor-without-persistent-storage" it means the sensor will not write any data to the host. In this case, logs will be available inside the sensor container at the following location:
/usr/local/qualys/qpa/data/