Crash when trying to change location for AppImage files in AppImageLauncherSettings

[moonlitpath]

Pre-submit checks

• [X] I checked for similar issues beforehand, but could not find any, not even closed ones. I could not add my bug report to any existing issue.
• [X] I am going to take the time to to fill in all the required details. I know that the bug report will be dismissed otherwise.

Describe the bug

AppImageLauncherSettings is crashing when opening file picker.

Expected behavior

No crash.

Steps to reproduce the issue

1. Open AppImageLauncherSettings
2. Click on the folder icon next to the input field

Screenshots

No response

Distribution and desktop environment

Debian 12 with Xfce

Installed AppImageLauncher version

2.2.0-travis995~0f91801+bionic

List of AppImages you tried

No response

Additional context

[AppImageLauncher] Warning: can't find fallback icon for namedialog-ok
[AppImageLauncher] Warning: can't find fallback icon for namedialog-cancel

(AppImageLauncherSettings:4785): Gtk-WARNING **: 21:19:42.311: Could not load a pixbuf from icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.
**
Gtk:ERROR:../../../gtk/gtkiconhelper.c:495:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /usr/share/icons/elementary-xfce/status/16/image-missing.png: Fatal error reading PNG image file: bad parameters to zlib (gdk-pixbuf-error-quark, 0)
Bail out! Gtk:ERROR:../../../gtk/gtkiconhelper.c:495:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /usr/share/icons/elementary-xfce/status/16/image-missing.png: Fatal error reading PNG image file: bad parameters to zlib (gdk-pixbuf-error-quark, 0)

[moonlitpath]

Duplicate of https://github.com/TheAssassin/AppImageLauncher/issues/218