i dont know whats goning on but i cant upgread my ubuntu

[diplov khatri]

i cant upgread my ubuntu to leatest version. i dont know the problems but it stops upgread

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.38
ProcVersionSignature: Ubuntu 5.4.0-52.57~18.04.1-generic 5.4.65
Uname: Linux 5.4.0-52-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.17
Architecture: amd64
CrashDB: ubuntu
Date: Tue Nov 3 10:11:05 2020
InstallationDate: Installed on 2019-12-22 (316 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-11-03 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2020-11-03 10:05:23.251034
 Log time: 2020-11-03 10:05:51.185131
 Log time: 2020-11-03 10:11:01.912985
 Log time: 2020-11-03 10:11:09.665285
VarLogDistupgradeTermlog:

[Brian Murray (brian-murray)]

Reviewing the log file, /var/log/dist-upgrade/main.log, from your upgrade attempt there was a failure to communicate with the mirror of the Ubuntu archive which you use. This could either be due to an issue with your connection to the mirror or with the mirror itself. Regardless, this is an issue you'll need to sort out by fixing your network connection or switching to a different mirror of the Ubuntu archive before the upgrade can complete. If after resolving the communication error with the mirror you are still unable to upgrade to a new release of Ubuntu please open a new bug report so we'll have fresh log files. Thanks and good luck!

[Launchpad Janitor (janitor)]

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