Second crash of Ubuntu install side-by-side with Linux Mint 19.1

[Kurt Reed-Suokas]

My initial USB drive had been configured for MBR and I was installing side-by-side with a GPT installation of Linux Mint 19.1. Thinking that may have been the reason for the crash, I recreated my USB drive with GPT from the 18.04.2 ISO. The failure occurred in the same place during the installation: right after I input the credential information and the installation process began.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.12
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: Tue Apr 2 18:22:09 2019
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
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: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Sebastien Bacher (seb128)]

The log has those errors
 'QUASHFS error: zlib decompression failed, data probably corrupt'

It looks like a corrupted image/media, could you check the md5 of your image and maybe try with another device?

[Launchpad Janitor (janitor)]

[Expired for ubiquity (Ubuntu) because there has been no activity for 60 days.]