Upgrade to Ubuntu 20.04.2 from 18.04 fails- Can't calculate the upgrade

[Scotland]

When attempting to upgrade to 20.04.2 from 18.04, I receive an error message that "Ubuntu could not calculate the upgrade". I attempted ppa-purge on a few ppas hoping that might address the issue, do not seem to have any broken packages and sudo apt upgrade and update run clean. I checked /var/log/dist-upgrade main.log and apt.log but nothing jumps out at me as to what is causing the issue. Any help would be greatly appreciated. TIA.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.42
Uname: Linux 5.0.20-050020-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.23
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Wed Apr 14 01:46:33 2021
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 bionic on 2021-04-14 (0 days ago)
VarLogDistupgradeTermlog:

[Brian Murray (brian-murray)]

Thanks for taking the time to report this upgrade failure. There is currently a new version of the release upgrader available in -proposed which may resolve the error you've encountered. Please run the following command to test the new version of the upgrader:

  do-release-upgrade -p

Please lets us know the results in this bug report. Thanks again and good luck!

[Launchpad Janitor (janitor)]

[Expired for ubuntu-release-upgrader (Ubuntu) because there has been no activity for 60 days.]