Error when updating bios

I am using Lubuntu
Error code
MrChromebox Firmware Utility Script starting up

Downloading supporting files…
firmware-util.sh: line 56: ./sources.sh: No such file or directory
firmware-util.sh: line 57: ./firmware.sh: No such file or directory
firmware-util.sh: line 58: ./functions.sh: No such file or directory
firmware-util.sh: line 64: prelim_setup: command not found
root@pato-celes:~# ^C
root@pato-celes:~#

You’re at the firmware flashing portion of the process?

How did you initiate the firmware utility script?

Try booting a non Ubuntu based distribution, such as Debian or Fedora.

Also note Ubuntu is not supported here