Reproduced (unintentionally) on noble after I removed the GNOME Characters and a couple of other GNOME packages and replaced them with flatpaks. Fixed by installing the native gjs package.
Extensions opens a window with unselectable text, Something's gone wrong We're very sorry, but it was not possible to get the list of installed extensions. Make sure you are logged into GNOME and try again. Error "org.gnome.Extensions No such file or directory" after fresh install from Flathub on Ubuntu 24.04. $ flatpak --user install org.gnome.Extensions Looking for matches… org.gnome.Extensions permissions: ipc fallback-x11 wayland x11 dri dbus access [1] [1] org.gnome.SessionManager, org.gnome.Shell.Extensions ID Branch Op Remote Download 1. [✓] org.gnome.Extensions.Locale stable i flathub 7.5 kB / 140.8 kB 2. [✓] org.gnome.Extensions stable i flathub 305.7 kB / 352.9 kB Installation complete. $ flatpak --user run org.gnome.Extensions (gnome-extensions-app:3): Extensions-CRITICAL **: 13:35:17.420: Gio.DBusError: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ExecFailed: Failed to execute program org.gnome.Shell.Extensions: No such file or directory asyncCallback@resource:///org/gnome/gjs/modules/core/overrides/Gio.js:114:23 _init/GLib.MainLoop.prototype.runAsync/</<@resource:///org/gnome/gjs/modules/core/overrides/GLib.js:263:34 (gnome-extensions-app:3): Extensions-CRITICAL **: 13:35:17.440: Gio.DBusError: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ExecFailed: Failed to execute program org.gnome.Shell.Extensions: No such file or directory asyncCallback@resource:///org/gnome/gjs/modules/core/overrides/Gio.js:114:23 _init/GLib.MainLoop.prototype.runAsync/</<@resource:///org/gnome/gjs/modules/core/overrides/GLib.js:263:34 $ sudo apt install gjs ... The following NEW packages will be installed: gjs ... Setting up gjs (1.80.2-1build2) ... $ flatpak --user run org.gnome.Extensions -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1993831 Title: gnome-shell does not contain gjs dependence To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1993831/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs