clusterssh stopped working on Ubuntu 20.04

[Bill Miller]

When you try to add any host to clusterssh it fails with the following error message

Tk::Error: Can't locate object method "resolve_names" via package "App::ClusterSSH::Window" at /usr/share/perl5/App/ClusterSSH/Window/Tk.pm line 349.
 App::ClusterSSH::Window::Tk::add_host_by_name at /usr/share/perl5/App/ClusterSSH/Window/Tk.pm line 349
 App::ClusterSSH::Window::Tk::__ANON__ at /usr/share/perl5/App/ClusterSSH/Window/Tk.pm line 1746
 Tk callback for .#menu.#menu#hosts
 Tk::__ANON__ at /usr/lib/x86_64-linux-gnu/perl5/5.30/Tk.pm line 251
 Tk::Menu::Invoke at /usr/lib/x86_64-linux-gnu/perl5/5.30/Tk/Menu.pm line 532
 <ButtonRelease>
 (command bound to event)

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: clusterssh 4.14-1
ProcVersionSignature: Ubuntu 5.15.0-41.44~20.04.1-generic 5.15.39
Uname: Linux 5.15.0-41-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: MATE
Date: Wed Jul 13 12:14:48 2022
InstallationDate: Installed on 2018-04-27 (1538 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
SourcePackage: clusterssh
UpgradeStatus: Upgraded to focal on 2021-10-03 (283 days ago)

[Launchpad Janitor (janitor)]

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

[Daniel mohr (di7aw0go)]

This bug report seems to be identical to the bug report: https://bugs.launchpad.net/ubuntu/+source/clusterssh/+bug/1897899