[Bug 1869278] [NEW] grub-install /dev/sda failed during installation

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I'm trying to install Ubuntu 18.04.4 LTS (downloaded it yesterday) on my
laptop so I could dual boot with Windows 10 (already installed) and in
the process I got the message: "The execution of «grub-install /dev/sda»
failed. This is a fatal error.

This is my first time reporting a bug or problem on this website, I
don't know what information should I add. Hope you can help me.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.14 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 5.3.0-28.30~18.04.1-generic 5.3.13
Uname: Linux 5.3.0-28-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
CasperVersion: 1.394.3
CurrentDesktop: ubuntu:GNOME
Date: Thu Mar 26 20:55:23 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1)
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)

** Affects: grub-installer (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic ubiquity-18.04.14.14 ubuntu
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grub-install /dev/sda failed during installation
https://bugs.launchpad.net/bugs/1869278
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