[Assist] boot.cfg: encrypted root partition

[Stayvoid]

> The second one.

boot.cfg:

title Parabola GNU/Linux-libre
kernel (wd0,0)/boot/vmlinuz-linux-libre
initrd (wd0,0)/boot/initramfs-linux-libre.img
args root=/dev/mapper/main console=tty no_auto_cmd

I was able to select "Parabola GNU/Linux-libre," then the following
message appeared:

file is not set or not exist!
path is not complete, haven't selected the device or file!
The boot.cfg not existed!System will try default entry from al.

What's wrong?