Netinsall, tty, apt-get update not working

Oh, so you did LUKS over LVM then. I did the opposite.
I doubt mine is really safer (preventing access to the LVM partitions in the first place); plus yours allows stretching partitions over several physical disks. My LVM is set in stone instead, so to speak (But I don't need the feature on that machine).

Unfortunately, I tried removing the USB stick several times without success, even changing the installation path to /dev/sdb didn't work either. I think I even tried /dev/mapper/herd-of-cats_main.
Also there's no CD drive on that machine. Why would a CD be different btw? Because it's not seen as /dev/sdX maybe?

I don't know how it's supposed to work.
So the image is burned to the CD.
Why, during the install, would it accept installing GRUB on my encrypted drive more than if I use a USB stick instead?
Normally, a CD is recognized as some kind of drive I think.

So I see no reason for it to be different.
At least that's my conclusion with the knowledge I have for now.