Error Message from firmware update

[hydrogencl]

Hardware: BrickPi3 + Raspberry Pi Zero W
OS: Raspian Buster Lite

When I am try to update the firmware by executing the shell script brickpi3samd_flash_firmware.sh, there pop up the error message:

    NOT_FOUND_9000c1

I just simply modify the first if paragraph and add these lines after

    elif [ "$RPI_VERSION" == "RPI4" ] ; then
    # use rpi2 interface config file
        INTERFACE_FILE="rpi4.cfg":

    else
        INTERFACE_FILE="rpi1.cfg"

to force using the rpi1.cfg to update the firmware. Hope this method can solve this issue.