package shim-signed (not installed) failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1

[mohammad]

package grub-efi-amd64-signed failed

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: shim-signed (not installed)
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
Uname: Linux 4.15.0-23-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
AptOrdering: NULL: ConfigurePending
Architecture: amd64
Date: Thu Jul 12 16:43:38 2018
Df:
 Filesystem 1K-blocks Used Available Use% Mounted on
 /dev/sda8 114821252 4116984 104828556 4% /
 udev 4003096 0 4003096 0% /dev
 tmpfs 804856 1752 803104 1% /run
 /dev/sda5 2886608 80156 2640104 3% /boot
DpkgTerminalLog:
 Setting up shim-signed (1.34.9+13-0ubuntu2) ...
 Installing for x86_64-efi platform.
 grub-install: error: cannot find EFI directory.
 dpkg: error processing package shim-signed (--configure):
  installed shim-signed package post-installation script subprocess returned error exit status 1
ErrorMessage: installed shim-signed package post-installation script subprocess returned error exit status 1
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions:
 dpkg 1.19.0.5ubuntu2
 apt 1.6.2
SourcePackage: shim-signed
Title: package shim-signed (not installed) failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)