As far as i understand, emacs says libtiff isnt installed and so you need to install it to use emacs. There is also another error about grub, to solve that you need to (re)generate grub.cfg. this is how you may do it:
Boot into a live parabola environment, do

pacman -Sy

to update the repos. then mount the installation root to /mnt (and other partitions such as '/boot to /mnt/boot' if you have), pacstrap libtiff:

pacstrap /mnt libtiff

to it and chroot into it:

arch-chroot /mnt

then run this command to (re)genererate grub config

grub-mkconfig -o /boot/grub/grub.cfg

you may also need to "regenerate" initramfs and that can be done running this command in chroot

mkinitcpio -P or mkinitcpio -p KERNEL

the problem should be fixed then. if not, let us know

the present concern is to 'confirm' the bug - nothing will
happen while the status is 'unconfirmed'

it seems very unlikely that emacs would eat grub.cfg; so this
probably represents two different unrelated issues; both of
which should be confirmed independently - perhaps another ticket
would be needed

Yes, it seems that it indeed wasn't an issue of emacs, but the hard drive in my thinkpad X200 seems to have loosened for some reason at the most convenient time, when I had installed this package and there were library errors. The grub.cfg error message seemed to have been from libreboot itself.

This issue may be closed.