grub-install /dev/sda error boot-repair error mbr /dev/sdc ook error.

[zdkdick]

(USB-creater)
1 UEFI new instal ubuntu 22.04.1
grub-install /dev/sda error

2 Boot-repair yannubuntu error
boot-repair-4ppa200 [20221028_1958]

============================== Boot Info Summary ===============================

 => No boot loader is installed in the MBR of /dev/sda.
 => No boot loader is installed in the MBR of /dev/sdb.
 => Grub2 (v2.00) is installed in the MBR of /dev/sdc and looks at sector 1 of
    the same hard drive for core.img. core.img is at this location and looks
    for (,msdos6)/boot/grub. It also embeds following components:

3 UEFI new instal /dev/sda1 error efi
4 UEFI new instal /dev/sdc error mbr

OS#1: Ubuntu 20.04.5 LTS on sda2
OS#2: Ubuntu 20.04.1 LTS on sdc2
OS#3: Ubuntu 22.04.1 LTS on sdb1
BIOS/UEFI firmware: 80.20(4.6) from AMI

5 please help

Dick

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: ubiquity 22.04.17
ProcVersionSignature: Ubuntu 5.15.0-43.46-generic 5.15.39
Uname: Linux 5.15.0-43-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.470
Date: Fri Oct 28 21:27:57 2022
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1)
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)