Unable to install 17.01

I am unable to install 17.01. The bootloader installation fails. Since I have multiple Linux distributions running on my desktop, I booted off another one and tried to manually install the bootloader (via chroot). That didn’t work either.
I then tried to update the grub configuration of Ubuntu which added Netrunner to the bootloader. However, in this case the boot failed but I could not enter single user mode because the root login is disabled (due to sudo, I presume). :huh:

So far, I’ve followed every step that I usually do when a live cd fails to install but without success. :-/

Has anyone faced similar issue?

Same or similar issue. see below my message and responses.