trying to install dual-boot Ubuntu alongside Windows 10 on a Lenovo ThinkPad T480

[Tuan Nguyen]

I've tried installing it to /dev/sda (main partition?) and /dev/sda4 (ext4 - target Ubuntu partition), in both scenarios, I get "Unable to install GRUB in /dev/sda[|sda4]"

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: ubiquity 22.04.20
ProcVersionSignature: Ubuntu 6.2.0-26.26~22.04.1-generic 6.2.13
Uname: Linux 6.2.0-26-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.470.2
CurrentDesktop: ubuntu:GNOME
Date: Fri Feb 9 12:53:25 2024
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230807.2)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)