Hmm. Well, the reason I followed:
Is because using the chroot button in Rani gives me:
/usr/lib/os-probes/50mounted-tests: line 186: 3394 Segmentation fault (core dumped) grub-mount "$partition" "$tmpmnt" 2> /dev/null
/usr/lib/os-probes/50mounted-tests.orig: line 72: 3409 Segmentation fault (core dumped) grub-mount "$partition" "$tmpmnt" 2> /dev/null
/usr/lib/os-probes/50mounted-tests: line 186: 3430 Segmentation fault (core dumped) grub-mount "$partition" "$tmpmnt" 2> /dev/null
/usr/lib/os-probes/50mounted-tests.orig: line 72: 3445 Segmentation fault (core dumped) grub-mount "$partition" "$tmpmnt" 2> /dev/null
/usr/lib/os-probes/50mounted-tests: line 186: 3488 Segmentation fault (core dumped) grub-mount "$partition" "$tmpmnt" 2> /dev/null
/usr/lib/os-probes/50mounted-tests.orig: line 72: 3503 Segmentation fault (core dumped) grub-mount "$partition" "$tmpmnt" 2> /dev/null
/usr/lib/os-probes/50mounted-tests: line 186: 3856 Segmentation fault (core dumped) grub-mount "$partition" "$tmpmnt" 2> /dev/null
/usr/lib/os-probes/50mounted-tests.orig: line 72: 3871 Segmentation fault (core dumped) grub-mount "$partition" "$tmpmnt" 2> /dev/null
grub-probe: error: cannot find a GRUB drive for /dev/sdb2. Check your device.map.
grub-probe: error: cannot find a GRUB drive for /dev/sdb2. Check your device.map.
==> ERROR: No Linux partitions detected!
Press enter to exit