GUI fails to launch on fedora 40 workstation and silverblue

[Hxs2fJKjYZ]

I recently installed gpgfrontend flatpak on fedora 40 workstation and silverblue, but when I try to launch it, it shows as running in the background on Gnome, but the GUI doesn't launch. I have the same problem with the appimage version, both 2.1.3. I tried version 2.1.2 appimage and that one seems to launch without any issues.
This is a screenshot of the flatpak version run in terminal:

Any help would be appreciated.

[saturneric]

You can try option -l trace or -l debug, and then more information will show.

[danruggi]

Same here, fedora 40, fresh install

[Hxs2fJKjYZ]

I don't know if it will help or not, but here is the output from running the appimage QT5 and QT6 version

[saturneric]

I remember an anonymous user mentioning something to me, he said it was wayland having some issues with the flatpak environment again. I don't know if this is related, you guys could try disabling wayland and then theoretically the app will fallbak to x11 mode, if that works.

[saturneric]

Found something here: Ultimaker/Cura#12776 (comment)

It appears that you can try this command for launch:
GDK_BACKEND=x11 LD_PRELOAD=/usr/lib64/libstdc++.so.6 ./GpgFrontend.AppImage