Firmware update

Hi. Already try different dockers (GitHub - balena-io-hardware/balena-fin-firmata-flash: BalenaFin application to flash the on-board co-processor with the latest version of balenaFin Firmata and GitHub - balenablocks/finabler: A block for balenaFin devices, handling coprocessor firmware flashing and operations, and exposing helpful balenaCloud tags) and both fail in the same place:
cannot open /dev/ttyUSB0
I’m able to see cannot open /dev/ttyS0 , but since balenaFin revision 09 , guess code will try to use ttyUSB0

Any fix?