dual boot with intel rst raid1 with UEFI boot, security enabled, grub-efi-amd64 signed package failed to install target

1. I deleted the ubuntu EFI directory from windows 10 diskpart so that I could get a clean ubuntu 18.04 installation.
2. Installed / on the same drive as windows 10 (shrunk, unallocated partition) and swap and /home on a different raid1 drive.
3. Pointed to the EFI Partition on the disk partitioning menu.
4. Went almost to the end before it crashed.

Going to try ubiquity -b installation and see if I can build grub manually after ubuntu installs without a bootloader.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.6
ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
Uname: Linux 4.15.0-29-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CasperVersion: 1.394
Date: Sat Sep 8 21:54:53 2018
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
LiveMediaBuild: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)