Full System Encryption + non-bootable NVMe drive + bootable USB drive

Hi Everyone,

I have system that is unable to boot from NVMe drive and am trying to install 18.04 on the NVMe drive with full disk encryption using a USB drive to boot from following the Manual Full System Encryption guide at https://help.ubuntu.com/community/Ma...stemEncryption.

I created GPT partition tables on both drives, an EFI partition on the USB drive and a system partition on the NVMe drive and installed Ubuntu on this setup following the guide.

When the system boots the USB drive shows up as a UEFI boot source in the boot menu, grub loads then I get the following error message:

error: no such cryptodisk found
error: no such device: SOMEUID
error: no server is specified
error: you need to load the kernel first.

The grub ubuntu boot script consists of the following:

setparams: 'Ubuntu'

recordfail
load_video
gfxmode $linux_gfx_mode
insmod gzio
if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
insmod part_gpt
insmod cryptodisk
insmod luks
insmod gcry_rijndael
insmod gcry_rijndael
insmod gcry_sha512
insmod lvm
insmod ext2
cryptomount -u SOMEUID
set root='lvmid/SOMEUIDPATH/SOMEOTHERUID'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint='lvmid/SOMEUIDPATH/SOMEOTHERUID'
else
search --no-floppy --fs-uuid --set=root SOMEUID
fi

How can I diagnose this issue?

Best regards,
Kris