Do you see ubuntu login screen after connecting to /dev/ttyACM0 via minicom ? If so, you can check running cat /etc/nvidia/version-ubuntu-rootfs.txt to know DRIVE OS version
Also, please check running version on Aurix console.
Did you receive the board from any other customer or from a team member? Is the devkit opened? I see similar issue at Flashing process exited with error 116