i just downloaded a Ubuntu Mate brand new and got the same crash of installer at the very end , same bootloder failure again

[John D]

i have a dual boot set up, i put in a brand new windows 10 on my main drive and attempted to put a new live usb version of Ubuntu Mate 18.04 lts nothing special just followed the installer prompts, nothing fancy. all was new, and again i get the same problem. i tried to eliminate all my potential mistakes and hoped for the best, but no. apparently , the installer put a version onto the partition but cant boot into it, but i am not sure. why it waits till the very end to notify of a crash is not good. it would turn most people away from ubuntu totally. i have endured over a dozen tries both plain ubuntu 18 and mate versions on live cd and live use. cant make it go. even the workaround , installing the bootloader through the repair method , copy/paste failed to boot into the supposed system what's up. dont want any new linux users? isnt good.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CasperVersion: 1.394
Date: Sun May 20 08:31:55 2018
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu-mate.seed boot=casper quiet splash ---
LiveMediaBuild: Ubuntu-MATE 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Phillip Susi (psusi)]

Your disk is currently partitioned to boot in bios mode, but you booted the installer in EFI mode. You either need to boot the installer in bios mode, or partition the disk using GPT and set up an EFI system partition to install in EFI mode. This will be done for you if you choose the "use entire disk" guided install option.