The quadstick is not being seen by QMP.
QMP needs access to the flash drive to make changes to the Quadstick. It can also be done through a serial connection, but there would be a message that a serial connection was found to the Quadstick if that were the case.
If the Quadstick was in USB mode 6 and the flash drive was disabled, the second highlighted line would not be listed. It would say it was connected and in PS4 mode.
The Quadstick needs to be connected and in USB modes 0,2, or 4, to allow QMP to make changes, or a serial connection via bluetooth or a cable in place.
The flash drive is "None".
If the Quadstick is plugged in to the PC, try selecting a different configuration file and restarting QMP.