[Bug 1896918] Re: Upgrade from 18.04 to 20.04 not working

[Christine]

Thank you for the suggestion Daniel. I used Synaptic Package Manager to
search for nodejs. Four entries were found (nodejs, -dev, -doc and
-mozilla) but when I right-clicked on each entry, it said "mark for
installation". Also, there is nothing listed under "installed version".
So I assume there aren't any nodejs packages installed. Or is there
another way to find them, I'm not aware of? Like through terminal
commands.

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https://bugs.launchpad.net/bugs/1896918

Title:
  Upgrade from 18.04 to 20.04 not working

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

Bug description:
  When attempting to upgrade to ubuntu 20.04 through Software Updater, I
  receive this message:

  Could not calculate the upgrade

  An unresolvable problem occurred while calculating the upgrade.

   If none of this applies, then please report this bug using the
  command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If
  you want to investigate this yourself the log files in '/var/log/dist-
  upgrade' will contain details about the upgrade. Specifically, look at
  'main.log' and 'apt.log'.

  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
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Sep 24 18:35:11 2020
  InstallationDate: Installed on 2019-02-08 (593 days ago)
  InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-09-24 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.release-upgrades: 2020-09-24T17:52:46.274401

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