AppImage doesn't work any more (dependency problems?) under Debian (Trixie/Testing)

[Sadi58]

Below is the cleaned terminal output of "~/.local/opt/whatsapp-for-linux-1.6.5-x86_64.AppImage" under Debian Trixie/Testing and KDE Plasma 5.27.11, which simply launched a blank app window (libxapp-gtk3-module v. 2.4.8-1 is installed).
Note: I tried this after encountering some dependency problems wit the DEB file. But I went on to resolve them manually after this AppImage failure.

Gtk-Message: Failed to load module "xapp-gtk3-module"
Gtk-Message: Failed to load module "colorreload-gtk-module"
Gtk-Message: Failed to load module "window-decorations-gtk-module"
Gtk-Message: Failed to load module "appmenu-gtk-module"
Gtk-Message: Failed to load module "xapp-gtk3-module"
/usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so: undefined symbol: g_assertion_message_cmpint
Failed to load module: /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
/tmp/.mount_whatsai4N60p/usr/lib/x86_64-linux-gnu/libgnutls.so.30: version `GNUTLS_3_7_4' not found (required by /usr/lib/x86_64-linux-gnu/gio/modules/libgiognutls.so)
Failed to load module: /usr/lib/x86_64-linux-gnu/gio/modules/libgiognutls.so
Gtk-Message: Failed to load module "colorreload-gtk-module"
Gtk-Message: Failed to load module "window-decorations-gtk-module"
Gtk-Message: Failed to load module "appmenu-gtk-module"

** (WebKitWebProcess:15872): WARNING **: 13:06:19.036: Error loading the injected bundle (/usr/lib/x86_64-linux-gnu/webkit2gtk-4.1/injected-bundle/libwebkit2gtkinjectedbundle.so): /usr/lib/x86_64-linux-gnu/webkit2gtk-4.1/injected-bundle/libwebkit2gtkinjectedbundle.so: undefined symbol: _ZN6WebKit26WebProcessExtensionManager10initializeEPNS_14InjectedBundleEPN3API6ObjectE