[Bug 1820385] [NEW] Ubuntu 18.04 to 18.10 This upgrade software shows "could not calculate the ugprade"

[Good Name]

Public bug reported:

I am attempting to upgrade from ubuntu 18.04 to 18.10 using this upgrade
software, as soon as it gets to part where it says "calculating changes"
i get that error "could not calculate the ugprade", i could not find
anything about it. on those versions

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.30
ProcVersionSignature: Ubuntu 4.18.0-16.17~18.04.1-generic 4.18.20
Uname: Linux 4.18.0-16-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: GNOME
Date: Sat Mar 16 10:57:06 2019
InstallationDate: Installed on 2019-02-22 (21 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2019-03-16 (0 days ago)
VarLogDistupgradeTermlog:
 
mtime.conffile..etc.update-manager.release-upgrades: 2019-03-08T20:17:21.674317

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic dist-upgrade

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https://bugs.launchpad.net/bugs/1820385

Title:
  Ubuntu 18.04 to 18.10 This upgrade software shows "could not calculate
  the ugprade"

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

Bug description:
  I am attempting to upgrade from ubuntu 18.04 to 18.10 using this
  upgrade software, as soon as it gets to part where it says
  "calculating changes" i get that error "could not calculate the
  ugprade", i could not find anything about it. on those versions

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.30
  ProcVersionSignature: Ubuntu 4.18.0-16.17~18.04.1-generic 4.18.20
  Uname: Linux 4.18.0-16-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.6
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: GNOME
  Date: Sat Mar 16 10:57:06 2019
  InstallationDate: Installed on 2019-02-22 (21 days ago)
  InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2019-03-16 (0 days ago)
  VarLogDistupgradeTermlog:
   
  mtime.conffile..etc.update-manager.release-upgrades: 2019-03-08T20:17:21.674317

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