Unable to restore stock firmware

Screenshot from 2023-11-30 19-17-25

EDIT: Found the instructions on the chrultrabook site - was looking at mrchromebox previously

Ubuntu apparently not recognising device/platform. I have the stock rom on usb ready. Is there a way to override board name? I understand there’s a way to manually flashrom but I can’t find instructions (only debricking from another device).

I’m currently booted to a live usb and preferably don’t want to end the session because I’ve had issues with the bootloader hanging on the logo for 30+ mins (which is why I’m trying to restore.)