Does not work with ARM64

Hi, I separately downloaded ubuntu-24.04.1-live-server-arm64.iso (not amd64) but then I got the error:

    sed: can't read /tmp/tmp.4pvDRE7SDj/boot/grub/loopback.cfg: No such file or directory

I don't know if this update is critical (or whether we should just say "if exists"). I am surprised the tree directory is different from AMD.