Ubuntu installation on a blank computer (without operating system). everything goes, well until "impossible to install GRUB in / dev / sdb" fatal error

[ROMAIN Anthony]

Ubuntu installation on a blank computer (without operating system). everything goes, well until "impossible to install GRUB in / dev / sdb"
fatal error

Description: Ubuntu 18.04.4 LTS
Release: 18.04

Thank you, for your time

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.14
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
Date: Mon Feb 17 20:43:22 2020
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd quiet splash --- debian-installer/language=fr keyboard-configuration/layoutcode?=fr keyboard-configuration/variantcode?=oss
LiveMediaBuild: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)