Fail to upgrade from 22.04 to 23.10

[Gordon Bateman]

Both apt.log and main.log do not appear to contain any help in pinpointing the error

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: ubuntu-release-upgrader-core 1:22.04.19
ProcVersionSignature: Ubuntu 6.5.0-28.29~22.04.1-generic 6.5.13
Uname: Linux 6.5.0-28-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CrashReports: 640:1000:125:60391:2024-04-29 15:33:53.884913579 +0100:2024-04-29 15:33:53.884913579 +0100:/var/crash/_usr_bin_calibre-parallel.1000.crash
CurrentDesktop: KDE
Date: Sun May 5 17:45:01 2024
InstallationDate: Installed on 2021-06-26 (1043 days ago)
InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to jammy on 2024-05-05 (0 days ago)
VarLogDistupgradeAptHistorylog:
 Start-Date: 2024-05-05 17:15:21
 Requested-By: gmb (1000)
 End-Date: 2024-05-05 17:15:21
VarLogDistupgradeApttermlog:
 Log started: 2024-05-05 17:15:21
 Log ended: 2024-05-05 17:15:21
modified.conffile..etc.update-manager.release-upgrades: [modified]
mtime.conffile..etc.update-manager.release-upgrades: 2024-05-04T14:20:47.834718