I am not able to install ubuntu in my laptop

[Viknesh T]

I am not able to install ubuntu in my laptop. after all completing all steps, a last step i am geting error message in Grub installer which is not installed due to which Ubuntu OS is not getting boot in my laptop. Kindly do needful

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: Sat May 16 23:03:37 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed cdrom-detect/try-usb=true noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper quiet splash ---
LiveMediaBuild: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)