[Bug 1927529] Traceback

[Ubuntu Foundations Team Bug Bot]

Exception during installation:
May  6 17:30:31 ubuntu plugininstall.py: Traceback (most recent call last):
May  6 17:30:31 ubuntu plugininstall.py:   File "/usr/share/ubiquity/plugininstall.py", line 1872, in <module>
May  6 17:30:31 ubuntu plugininstall.py:     install.run()
May  6 17:30:31 ubuntu plugininstall.py:   File "/usr/share/ubiquity/plugininstall.py", line 60, in wrapper
May  6 17:30:31 ubuntu plugininstall.py:     func(self)
May  6 17:30:31 ubuntu plugininstall.py:   File "/usr/share/ubiquity/plugininstall.py", line 236, in run
May  6 17:30:31 ubuntu plugininstall.py:     self.configure_bootloader()
May  6 17:30:31 ubuntu plugininstall.py:   File "/usr/share/ubiquity/plugininstall.py", line 994, in configure_bootloader
May  6 17:30:31 ubuntu plugininstall.py:     raise install_misc.InstallStepError(
May  6 17:30:31 ubuntu plugininstall.py: ubiquity.install_misc.InstallStepError: GrubInstaller failed with code 1
May  6 17:30:31 ubuntu plugininstall.py:

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https://bugs.launchpad.net/bugs/1927529

Title:
  installation time fatal error occured

Status in ubiquity package in Ubuntu:
  New

Bug description:
  Fatal error occurred while installing ubuntu 21.04 by removing the
  existing 20.04.

  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: ubiquity 21.04.19
  ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12
  Uname: Linux 5.11.0-16-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu65
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.461
  CurrentDesktop: ubuntu:GNOME
  Date: Thu May  6 23:00:33 2021
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
  ProcEnviron:
   LANGUAGE=en_IN
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_IN
   LC_NUMERIC=C.UTF-8
  RebootRequiredPkgs:
   linux-image-5.11.0-16-generic
   linux-base
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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