Cannot calculate upgrade to 23.04

[Matthew Bell]

Trying to upgrade to 23.04 from 22.04. Upgrade fails while calculating changes.

First is notice that third part sources are disabled:

''
Third party sources disabled

Some third party entries in your sources.list were disabled. You can re-enable them after the upgrade with the 'software-properties' tool or your package manager.
''

----------------------------------------------------------------------

Then this error presents:

''
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'.
''
-------------------------------------
main.log at time of failure:

2023-08-04 09:29:16,343 DEBUG quirks: running PreDistUpgradeCache
2023-08-04 09:29:16,343 DEBUG running Quirks.PreDistUpgradeCache
2023-08-04 09:30:24,491 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'
2023-08-04 09:30:24,531 DEBUG abort called
''

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: ubuntu-release-upgrader-core 1:22.04.16
ProcVersionSignature: Ubuntu 6.2.0-26.26~22.04.1-generic 6.2.13
Uname: Linux 6.2.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CrashReports:
 640:1001:125:6513493:2023-07-27 23:43:38.317912340 -0500:2023-07-27 23:43:39.317912340 -0500:/var/crash/_usr_bin_nautilus.1001.crash
 640:1001:125:4022040:2023-07-23 20:35:43.019398212 -0500:2023-07-23 20:35:44.019398212 -0500:/var/crash/_usr_bin_seahorse.1001.crash
CurrentDesktop: ubuntu:GNOME
Date: Fri Aug 4 00:27:28 2023
InstallationDate: Installed on 2022-02-09 (540 days ago)
InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to jammy on 2023-08-04 (0 days ago)
VarLogDistupgradeTermlog:

mtime.conffile..etc.update-manager.release-upgrades: 2023-08-03T22:15:22.538653

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.