Installer crashed while attempting to create bootloader

[Robert bare]

I not able to provide many other details, as this was a clean image of the installer that had not been modified in any way, and I was not installing along side windows 10 but deleting it and installing ubuntu in it's place.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.12 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 4.18.0-15.16~18.04.1-generic 4.18.20
Uname: Linux 4.18.0-15-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CasperVersion: 1.394
CurrentDesktop: ubuntu:GNOME
Date: Sun May 3 04:59:06 2020
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd quiet splash --- maybe-ubiquity
LiveMediaBuild: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

[Sebastien Bacher (seb128)]

Thank you for your bug report, could you give some details on how to selecting the partioning options?

The log has warnings similar to
May 3 08:59:03 ubuntu ubiquity: The device '/dev/sdb1' doesn't seem to have a valid NTFS.
May 3 08:59:03 ubuntu ubiquity: Maybe the wrong device is used? Or the whole disk instead of a
May 3 08:59:03 ubuntu ubiquity: partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
May 3 08:59:03 ubuntu ubiquity: NTFS signature is missing.
May 3 08:59:03 ubuntu ubiquity: Failed to mount '/dev/sdb2'
May 3 08:59:03 ubuntu ubiquity: : Invalid argument

Which suggests it's trying to mount ntfs partitions and failing for some reason