ail-cli fails to integrate appimage, works with GUI

[ecspresso]

Pre-submit checks

• 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.
• 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

Download an AppImage file (digiKam in this case) and integrate with with ail-cli:

> ail-cli integrate digiKam-8.1.0-x86-64.appimage 
Processing /home/ecspresso/Downloads/digiKam-8.1.0-x86-64.appimage

(process:97048): GLib-CRITICAL **: 11:44:29.238: g_file_test: assertion 'filename != NULL' failed
Moving AppImage to integration directory

The AppImage is moved to ~/Applications but no .desktop file is created.
The same process works as intended (moved and desktop file created) when just double clicking the file and doing it via the GUI.

Expected behavior

The file to be moved to ~/Applications and a .desktop file to be created.

Steps to reproduce the issue

1. Download an AppImage file (e.g. digikam).
2. Integrate the application: ail-cli integrate digiKam-8.1.0-x86-64.appimage
3. See error in terminal.

Screenshots

No response

Distribution and desktop environment

OS: Ubuntu 22.04.3 LTS
Desktop: Gnome 42.9.0

Installed AppImageLauncher version

ail-cli version 2.2.0 (git commit 0f91801), built on 2022-11-02 23:51:55 UTC

List of AppImages you tried

• digiKam 8.1.0 x86-64 (latest)

Additional context

#392 has a similar error output, but I suspect that the disappearance of the appimage file is because sudo was used, and that moved the file to the root users home folder when I tried it.

The file was moved to my home folder (with the error) when ran without sudo. Same problem when running with sudo, but moved to root's home folder instead.