[Bug 1948587] [NEW] Not able to upgrade to ubuntu 21.04

[MOHIT]

Public bug reported:

when i tried to install ubuntu 21.04 , the process got aborted everytime
and errors logs in the main.log file as attached with the bug

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.36
ProcVersionSignature: Ubuntu 5.4.0-89.100-generic 5.4.143
Uname: Linux 5.4.0-89-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
Date: Sun Oct 24 21:47:12 2021
InstallationDate: Installed on 2019-09-12 (772 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_IN:en
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to focal on 2021-10-24 (0 days ago)
mtime.conffile..etc.update-manager.release-upgrades: 2021-10-19T22:59:23.408269

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade focal

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https://bugs.launchpad.net/bugs/1948587

Title:
  Not able to upgrade to ubuntu 21.04

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  when i tried to install ubuntu 21.04 , the process got aborted
  everytime and errors logs in the main.log file as attached with the
  bug

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.36
  ProcVersionSignature: Ubuntu 5.4.0-89.100-generic 5.4.143
  Uname: Linux 5.4.0-89-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.20
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  Date: Sun Oct 24 21:47:12 2021
  InstallationDate: Installed on 2019-09-12 (772 days ago)
  InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_IN:en
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_IN
   SHELL=/bin/bash
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2021-10-24 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2021-10-19T22:59:23.408269

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