[Bug 1897799] Re: Essential package 'ubuntu-minimal' could not be located

[PabloAB]

After making the changes suggested on the question (for bionic) the
error is now

> Could not calculate the upgrade

Tried [this](https://askubuntu.com/a/360445/349837), but python-minimal
have too many dependencies.

    2020-09-29 18:07:04,656 INFO failed to remove python-minimal                                                                                                                                                      
    2020-09-29 18:07:05,349 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubuntu-release-upgrader in
Ubuntu.
https://bugs.launchpad.net/bugs/1897799

Title:
  Essential package 'ubuntu-minimal' could not be located

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

Bug description:
  While upgrading from bionic to focal fossa I get

  > 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.

  Just like [this user from
  Askubuntu](https://askubuntu.com/q/1231817/349837)

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.38
  ProcVersionSignature: Ubuntu 4.15.0-118.119-generic 4.15.18
  Uname: Linux 4.15.0-118-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.17
  Architecture: amd64
  CrashDB: ubuntu
  Date: Tue Sep 29 17:38:17 2020
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-09-29 (0 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2020-09-29 17:30:01.275265
   Log time: 2020-09-29 17:30:13.209067
   Log time: 2020-09-29 17:37:16.332964
   Log time: 2020-09-29 17:38:21.899194
  VarLogDistupgradeTermlog:

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1897799/+subscriptions