Doesn`t have grub

[Harysson Soares Rodrigues de Queiroz]

When I try install ubuntu 18.* there isn`t grub system to install.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.12
ProcVersionSignature: Ubuntu 5.0.0-23.24~18.04.1-generic 5.0.15
Uname: Linux 5.0.0-23-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Sep 7 09:40:16 2019
InstallCmdLine: BOOT_IMAGE=/multibootusb/ubuntu-18.04.3-desktop-amd64/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity iso-scan/filename= quiet splash ignore_bootid live-media-path=/multibootusb/ubuntu-18.04.3-desktop-amd64/casper cdrom-detect/try-usb=true floppy.allowed_drive_mask=0 ignore_uuid root=UUID=7F7A-8186 ---
ProcEnviron:
 LANGUAGE=pt_BR.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=pt_BR.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)