The app can't be launched since the Plasma 6 update.
Output when running flatpak run org.signal.Signal
Debug: Will run signal with the following arguments:
Debug: Additionally, user gave:
Set Windows Application User Model ID (AUMID) { AUMID: 'org.whispersystems.signal-desktop' }
NODE_ENV production
NODE_CONFIG_DIR /app/Signal/resources/app.asar/config
NODE_CONFIG {}
ALLOW_CONFIG_MUTATIONS undefined
HOSTNAME undefined
NODE_APP_INSTANCE undefined
SUPPRESS_NO_CONFIG_WARNING undefined
SIGNAL_ENABLE_HTTP undefined
userData: /home/USER/.var/app/org.signal.Signal/config/Signal
config/get: Successfully read user config file
config/get: Successfully read ephemeral config file
making app single instance
LaunchProcess: failed to execvp:
xdg-settings
LaunchProcess: failed to execvp:
xdg-settings
[2:0307/094319.443637:ERROR:ozone_platform_x11.cc(240)] Missing X server or $DISPLAY
[2:0307/094319.443718:ERROR:env.cc(257)] The platform failed to initialize. Exiting.
The app can't be launched since the Plasma 6 update.
Output when running
flatpak run org.signal.Signal