app crash notification came while installing ubuntu

[Saurabh Kumar]

i am new to ubuntu. so i don't know much. but while i was installing a fresh ubuntu on usb( to work as portable), this error occured.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15.17
ProcVersionSignature: Ubuntu 5.11.0-27.29~20.04.1-generic 5.11.22
Uname: Linux 5.11.0-27-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
CasperMD5CheckResult: fail
CasperVersion: 1.445.1
Date: Sun Nov 14 09:51:24 2021
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Erich Eickmeyer (eeickmeyer)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. While we appreciate the difficulties you are facing, it would appear that the image (ISO file) you downloaded is corrupt. Ubuntu automatically checks to see if its installation image is valid, and your log reported the following error:

> CasperMD5CheckResult: fail