I installed Lubuntu on a flash drive as you would an HD (not live/squashfs). But whenever I boot it I get a grub rescue prompt.
It says it
can't find /boot/grub/i386-pc/normal.mod which explains the rescue prompt. However, it's installed for x86_64. The folder for that arch is there with all the modules. When I did grub-install I targeted it to x86_64. When I try to explicitly insmod it it says
wrong arch elf magic. So it is definitely looking for i386 and in the right place, but why and how do I fix it?
My question is different than the suggested duplicates because there is no Windows installation on the flash drive, which must be machine-independent. Also, the solutions provided in either do not help - even boot-repair doesn't fix it.