I flashed the following ISO to a USB Key : DAppNode-0.2.39-debian-bullseye-amd64.iso
I tried to install with and without UEFI, same result. I made sure to re-install and validated that all installation steps, including the empty root password, LVM, and other parameters were identical to the setup guide.
@data-flep Thank you for your community support! @jdoshi1 Yes, it is a bug and will be solved soon, in the meanwhile you can try the other installation method, the main requirement is that you would need to have an OS already installed (preferably debian). If you have any doubt or you get stuck, do not hesitate to ask for help.
Will let you know with any updates about the ISO issue!