extension-manager crashes

Ubuntu Version: 22.04
Package: gnome-shell-extension-manager
Version: 0.3.0-0ubuntu2.1

After installing gnome-shell-extension-manager via the package manager (apt), things are working fine: I can launch the app and install/uninstall gnome extensions at will, without any problem. After a while (several days later, several reboots), the app doesn't launch. An uninstallation/reinstall solves the problem, until it starts again not to launch. As the usage of this package is very anecdotal, I am sadly not in the capacity to list the major changes that went onto my machine between days of the installation when it works and later when it doesn't.

When launching from terminal, I get the following output:

>> extension-manager

(extension-manager:27567): GLib-CRITICAL **: 14:38:07.734: the GVariant format string 'd' has a type of 'd' but the given value has a type of 's'

(extension-manager:27567): GLib-CRITICAL **: 14:38:07.734: g_variant_get: assertion 'valid_format_string (format_string, TRUE, value)' failed

(extension-manager:27567): Gtk-WARNING **: 14:38:07.761: Failed to set text 'Sound Input & Output Device Chooser' from markup due to error parsing markup: Error on line 1: Entity did not end with a semicolon; most likely you used an ampersand character without intending to start an entity — escape ampersand as &
Gdk-Message: 14:38:08.079: Error reading events from display: Protocol error

Thanks :)
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 22.04
InstallationDate: Installed on 2022-06-29 (42 days ago)
InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
NonfreeKernelModules: nvidia_modeset nvidia
Package: gnome-shell-extension-manager 0.3.0-0ubuntu2.1
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 5.15.0-43.46-generic 5.15.39
Tags: wayland-session jammy
Uname: Linux 5.15.0-43-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True