I wanted to upgrade from 18.04 to 20.04 when a dialog offered this and got an error message

[frankberger]

I wanted to upgrade from 18.04 to 20.04 when a dialog offered this and Ito send a bug with got an error message ubuntu-bug ubuntu-release-upgrader. The maschine was freshly booted.

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: XFCE
Date: Sun Oct 25 15:48:08 2020
InstallationDate: Installed on 2016-01-19 (1740 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-10-25 (0 days ago)
VarLogDistupgradeTermlog: