grub2 installed on /dev/sda failed when installing ubuntu on Lenovo ThinkPad Yoga 370 (the inside HDD is installed with FreeBSD 12.2)

[Yuxun Lu]

grub2 installed on /dev/sda failed when installing ubuntu on Lenovo ThinkPad Yoga 370 (the inside HDD is installed with FreeBSD 12.2)

The SDA device is connected via a USB 3.0.

I've disabled fast boot and secure boot and allow Thunder 3.0 to be used pre-booting (about the USB).

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15.10
ProcVersionSignature: Ubuntu 5.8.0-43.49~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-43-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
CasperMD5CheckMismatches: ./pool/main/m/make-dfsg/make_4.2.1-1.2_amd64.deb
CasperMD5CheckResult: skip
CasperVersion: 1.445.1
CurrentDesktop: ubuntu:GNOME
Date: Tue Nov 2 14:23:11 2021
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)