20.04 Virtualbox Fresh Install Crashes/Hangs

[Kevin]

Crash happens every time I attempt a fresh install of 20.04 on VirtualBox inside Windows10.

I've also gotten the following error:

The installer encountered an error copying files to the hard disk:
[Errno 5] Input/output error
This is often due to a faulty CD/DVD...

HyperV is not enabled in Windows

I've tried changing the drive between fixed/dynamic as well.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CasperVersion: 1.445
Date: Mon Aug 3 03:58:17 2020
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed initrd=/casper/initrd quiet splash --- maybe-ubiquity
LiveMediaBuild: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)