Update does not work.

[Richard Stoll]

Invalid package information

After updating your package information, the essential package 'ubuntu-minimal' could not be located. This may be because you have no official mirrors listed in your software sources, or because of excessive load on the mirror you are using. See /etc/apt/sources.list for the current list of configured software sources.
In the case of an overloaded mirror, you may want to try the upgrade again later.

IT IS THIS PROBLEM EVERY TIME, TRYING TO FIX, BUT IT HAS NOT BEEN ANY SUCCESS.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubuntu-release-upgrader-core 1:16.04.32
ProcVersionSignature: Ubuntu 4.4.0-210.242-generic 4.4.262
Uname: Linux 4.4.0-210-generic i686
ApportVersion: 2.20.1-0ubuntu2.30
Architecture: i386
CrashDB: ubuntu
Date: Fri May 28 17:35:40 2021
InstallationDate: Installed on 2021-05-23 (4 days ago)
InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Release i386 (20131016)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en
 PATH=(custom, no user)
 LANG=sv_SE.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to xenial on 2021-05-28 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2021-05-28 17:33:51.352444
 Log time: 2021-05-28 17:33:58.038893
 Log time: 2021-05-28 17:35:34.991621
 Log time: 2021-05-28 17:35:52.459183
VarLogDistupgradeTermlog:

[Brian Murray (brian-murray)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1813354, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.