"Error: Could not find tegrarcm_v2" when trying to flash J2012 using method 1

I am trying to flash a J2012. I am following the steps from: reComputer Industrial | Seeed Studio Wiki

When running the command “sudo ./tools/kernel_flash/l4t_initrd_flash.sh --flash-only --massflash 1 --network usb0 --showlogs” I run into the error “Error: Could not find tegrarcm_v2”. Is there a way to resolve this? Do I continue with this method or does SDK manager work?

Please follow this wiki: reComputerJ1020v2, J20 Series| J202 | Seeed Studio Wiki
The tutorial you are following does not apply to J2021