Today my ubuntu offered the possibility to upgrade to version 18.04, but when it tries to download the new software channels, it shows an error message "Unable to calculate update"
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: ubuntu-release-upgrader-core 1:17.10.11
ProcVersionSignature: Ubuntu 4.13.0-41.46-generic 4.13.16
Uname: Linux 4.13.0-41-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.8
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Mon May 14 13:36:21 2018
InstallationDate: Installed on 2017-11-25 (169 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to artful on 2018-05-14 (0 days ago)
VarLogDistupgradeTermlog:
Status changed to 'Confirmed' because the bug affects multiple users.