package grub-efi-amd64-signed 1.93.20+2.02-2ubuntu8.18 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Joshua Oluwanisola Dele-Adelusi]

Setting up grub-efi-amd64-bin (2.02-2ubuntu8.18) ...
Setting up grub2-common (2.02-2ubuntu8.18) ...
Setting up grub-efi-amd64 (2.02-2ubuntu8.18) ...
Replacing config file /etc/default/grub with new version
Installing for x86_64-efi platform.
efibootmgr: Could not set variable Boot000A: No such file or directory
efibootmgr: Could not prepare boot variable: No such file or directory
grub-install: error: efibootmgr failed to register the boot entry: Input/output error.
Failed: grub-install --target=x86_64-efi --no-extra-removable
WARNING: Bootloader is not properly installed, system may not be bootable
Sourcing file `/etc/default/grub'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.4.0-190-generic
Found initrd image: /boot/initrd.img-4.4.0-190-generic
Found linux image: /boot/vmlinuz-4.4.0-189-generic
Found initrd image: /boot/initrd.img-4.4.0-189-generic
done
Setting up grub-efi-amd64-signed (1.93.20+2.02-2ubuntu8.18) ...
Installing for x86_64-efi platform.
efibootmgr: Could not set variable Boot000A: No such file or directory
efibootmgr: Could not prepare boot variable: No such file or directory
grub-install: error: efibootmgr failed to register the boot entry: Input/output error.
dpkg: error processing package grub-efi-amd64-signed (--configure):
 subprocess installed post-installation script returned error exit status 1

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: grub-efi-amd64-signed 1.93.20+2.02-2ubuntu8.18
ProcVersionSignature: Ubuntu 4.4.0-190.220-generic 4.4.233
Uname: Linux 4.4.0-190-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.24
Architecture: amd64
Date: Thu Oct 1 14:47:15 2020
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2020-06-08 (115 days ago)
InstallationMedia: Lubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160720)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.6
 apt 1.2.32ubuntu0.1
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.93.20+2.02-2ubuntu8.18 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to bionic on 2020-10-01 (0 days ago)

[Seth Arnold (seth-arnold)]

Hello, does your BIOS / setup have any settings that would prevent updating the boot order?

Thanks