grub failed to install in efs partition

[David Wildman]

Install had finished and then grub began installing but failed instantly.

I had made an efi partition for the bootloader but there was a fatal error.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15.2
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
CasperMD5CheckMismatches: ./pool/main/s/shim-signed/shim-signed_1.40.3+15+1533136590.3beb971-0ubuntu1_amd64.deb
CasperMD5CheckResult: skip
CasperVersion: 1.445.1
Date: Wed Aug 12 22:28:23 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz persistent file=/cdrom/preseed/ubuntu.seed acpi=off splash ---
LiveMediaBuild: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)