error while installing ubuntu side-by-side with windows 10

[davill69]

error during bootloader installation

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: ubiquity 21.04.19
ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12
Uname: Linux 5.11.0-16-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu65
Architecture: amd64
CasperMD5json:
 {
   "result": "skip"
 }
CasperVersion: 1.461
Date: Sat Jun 5 18:02:28 2021
InstallCmdLine: BOOT_IMAGE=/multiboot/ubuntu-21.04-desktop-amd64/casper/vmlinuz iso-scan/filename=/multiboot/ubuntu-21.04-desktop-amd64/ubuntu-21.04-desktop-amd64.iso boot=casper noprompt noeject fsck.mode=skip floppy.allowed_drive_mask=0 ignore_uuid
LiveMediaBuild: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
RebootRequiredPkgs:
 linux-image-5.11.0-16-generic
 linux-base
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)