I've just installed Ubuntu-MATE 18.04.4 on a 1TB external SSD that I need to be able to boot into.
In my BIOS (not UEFI) desktop workstation (I don't use a laptop) I have an internal 1TB spinner drive from which I'm running an unstable MATE 14.04 as my only working system at the moment. It crashes about every ten minutes.
When I re-boot with the external SSD plugged in, I'm dropped into a busybox display with the message:
The file '/boot/grub/i386-pc/normal.mod' was not found.
How can I boot into the external SSD, and can I use the information in the line above to help accomplish this? Thanks for any suggestions!