cannot upgrade to ubuntu 20.04

[Megha]

cannot upgrade to ubuntu 20.04

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: ubuntu-release-upgrader-core 1:19.04.16.9
ProcVersionSignature: Ubuntu 5.0.0-38.41-generic 5.0.21
Uname: Linux 5.0.0-38-generic x86_64
ApportVersion: 2.20.10-0ubuntu27.3
Architecture: amd64
CrashDB: ubuntu
Date: Sat Jun 27 17:47:05 2020
InstallationDate: Installed on 2020-02-23 (125 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_IN:en
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_IN
 SHELL=/usr/bin/zsh
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to disco on 2020-06-27 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2020-06-27 17:44:59.987613
 Log time: 2020-06-27 17:45:21.842580
 Log time: 2020-06-27 17:46:57.504970
 Log time: 2020-06-27 17:47:03.320321
mtime.conffile..etc.update-manager.release-upgrades: 2020-06-19T17:21:01.560180

[Brian Murray (brian-murray)]

There was a problem communicating with the mirror of the Ubuntu archive which you use This is something you'll need to sort out so you can complete the upgrade.

2020-06-27 17:45:31,643 DEBUG examining: 'deb http://in.archive.ubuntu.com/ubuntu/ disco main restricted'
2020-06-27 17:45:31,643 DEBUG verifySourcesListEntry: deb http://in.archive.ubuntu.com/ubuntu/ eoan main restricted
2020-06-27 17:45:31,643 DEBUG url_downloadable: http://in.archive.ubuntu.com/ubuntu//dists/eoan/Release
2020-06-27 17:45:31,643 DEBUG s='http' n='in.archive.ubuntu.com' p='/ubuntu//dists/eoan/Release' q='' f=''
2020-06-27 17:46:03,228 DEBUG error from httplib: '<urlopen error [Errno 101] Network is unreachable>'
2020-06-27 17:46:03,228 DEBUG entry '# deb http://in.archive.ubuntu.com/ubuntu/ disco main restricted' was disabled (no Release file)

[Launchpad Janitor (janitor)]

[Expired for ubuntu-release-upgrader (Ubuntu) because there has been no activity for 60 days.]