could not calculate upgrade

[JEFF MANN]

The message I get is "Could not calculate upgrade. An unresolvable problem occurred while calculating the upgrade.

Wasn't sure if that was the same as some of your listed bugs.
Thanks

I also posted this as a question at answers launchpad.

package is ubuntu release upgrader
when i type in /var/log/dist-upgrade/
I get bash: /var/log/dist-upgrade/: Is a directory

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.40
ProcVersionSignature: Ubuntu 4.15.0-122.124-generic 4.15.18
Uname: Linux 4.15.0-122-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.17
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Fri Nov 6 09:09:25 2020
InstallationDate: Installed on 2018-05-02 (918 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-11-06 (0 days ago)
VarLogDistupgradeTermlog:

[Launchpad Janitor (janitor)]

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