installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 10

[Dick Scheeringa]

sudo dpkg --configure -a
Setting up grub-efi-amd64-signed (1.187.3+2.06-2ubuntu14.1) ...
dpkg: error processing package grub-efi-amd64-signed (--configure):
 installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 10
dpkg: dependency problems prevent configuration of shim-signed:
 shim-signed depends on grub-efi-amd64-signed (>= 1.187.2~) | grub-efi-arm64-signed (>= 1.187.2~); however:
  Package grub-efi-amd64-signed is not configured yet.
  Package grub-efi-arm64-signed is not installed.

dpkg: error processing package shim-signed (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 grub-efi-amd64-signed
 shim-signed
---------------------------------
copy of grub-efi-amd64-signed.postinst

#! /bin/sh
set -e

. /usr/share/debconf/confmodule

case $1 in
    configure)
 target=x86_64-efi
 # Check /boot/grub to see if we previously installed to an ESP. We don't
 # want to trigger the install code just by installing the package,
 # normally the installer installs grub itself first.
 if test -e /boot/grub/$target/core.efi; then
     if [ -x /usr/share/grub/grub-check-signatures ]; then
      /usr/share/grub/grub-check-signatures
     fi
     if [ -x /usr/lib/grub/grub-multi-install ]; then
      /usr/lib/grub/grub-multi-install --target=$target
     elif grub-install --help | grep -q 'auto-nvram'; then
      grub-install --target=$target --auto-nvram
     else
      grub-install --target=$target
     fi
 fi

 ;;
esac

Distributor ID: Ubuntu
Description: Ubuntu 22.10
Release: 22.10
Codename: kinetic

5.19.0-41-generic #42-Ubuntu SMP PREEMPT_DYNAMIC Mon Apr 17 19:17:03 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

ProblemType: Bug
DistroRelease: Ubuntu 22.10
Package: grub-efi-amd64-signed 1.187.3+2.06-2ubuntu14.1
ProcVersionSignature: Ubuntu 5.19.0-41.42-generic 5.19.17
Uname: Linux 5.19.0-41-generic x86_64
ApportVersion: 2.23.1-0ubuntu3.2
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Thu Apr 27 00:10:53 2023
InstallationDate: Installed on 2016-06-28 (2493 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
ProcEnviron:
 LANGUAGE=en_CA:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: grub2-signed
UpgradeStatus: Upgraded to kinetic on 2023-04-27 (0 days ago)

[Dick Scheeringa (dscheeringa)]

I will need assistance to determne where and which script actually fails.
I preserved these scripts do not have enough knowledge to do th problem determination.

D.S.

[Dick Scheeringa (dscheeringa)]

This is a multiple boot with Windows 10.