Zigbee firmware update

Failed to update.
What am I doing wrong?

I stopped the Docker HA service.

/usr/bin/AmberGwZ3_V8 -n1 -p /dev/ttyUSB1 -b115200 -F /tmp/zigbee.ota
ezsp ver 0x07 stack type 0x02
do ota…
Executing bootload callback.
Launching standalone bootloader…
Starting bootloader communications.
Delaying 4 seconds
Setting up serial port
Setting up serial port 1
Error: Timeout occurred waiting for read data.
}:C▒WT▒M~Failed to start bootloading communications.
Bootload failed. Exiting.
Reboot not supported. Exiting instead.