Fatal error during install using the option "wipe all data and install Ubuntu" (didn't make manual partitioning)

[Julio Reibel]

Happened during installation. It's the second time in a row trying to install on my laptoo with a new SSD.
The first time installed Windows 7 first (using 30-something gb from the 480 of my new Kingston SSD), then made the manual partitioning, begin to install and crashed similarly.
Some years before I also tried to install this Ubuntu version and never could because of similar problems. Ended up with 16.04.
I don't meet the system requirements for the 20.04 so after I finish this report I'm gone go ahead and install Win7 alongside Ubuntu 16.04 (and maybe upgrade from there, I don't know yet).
Hope this information is useful. I don't think I'm gonna be checking this report soon but hopefully I'll remember it in the near future.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.15
ProcVersionSignature: Ubuntu 5.4.0-42.46~18.04.1-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.9-0ubuntu7.16
Architecture: amd64
CasperVersion: 1.394.3
CurrentDesktop: ubuntu:GNOME
Date: Thu Oct 8 18:51:10 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 18.04.5 LTS "Bionic Beaver" - Release amd64 (20200806.1)
ProcEnviron:
 LANGUAGE=es_AR.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=es_AR.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)