failed to install GRUB boot loader

[Peter Ch]

Installing Ubuntu 17.10 on Asus i7 Haswell laptop.
GRUB installation fails, error message states the following.

"The 'grub-efi-amd64-signed" package failed to install into /target/. Without the GRUB boot loader, the installed system will not boot.'

The installation was using a custom partition scheme. I set the 550mb for /boot, 500mb for Grub, 84GB for / (root) and 3GB for Swamp. I have an existing 150GB /Home directory I was looking to keep.

This maybe because I tried creating a /boot and grub partitions on a single disc.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: grub-efi-amd64-signed (not installed)
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
ApportVersion: 2.20.7-0ubuntu3
Architecture: amd64
CasperVersion: 1.387
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 27 20:40:00 2017
LiveMediaBuild: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=C.UTF-8
 SHELL=/bin/bash
SourcePackage: grub2-signed
UpgradeStatus: No upgrade log present (probably fresh install)