Can't add images to Virtual Camera

[jocc]

I've just installed VisionAppster Builder 3.0-beta5 on Debian Linux Buster (x86_64). The installation was successful, there is no error messages on start, but on the "Virtual Camera" tab I cannot add images. If I press "Add images" (or "Select image stream") nothing happens. What can I do?

[-mt-]

Can you check for any errors visible in the message box when clicking the Messages button in the bottom bar? It would sound like there was an issue opening the file selection dialog in your system.

[jocc]

@mt Nothing. But when I start it from command line:

jocc@gep1deb:~$ /usr/bin/flatpak run --branch=master --arch=x86_64 --command=va-builder com.visionappster.Builder
Qt: Session management error: None of the authentication protocols specified are supported
qml: Could not start web server.
Model size of -784 is less than 0
Model size of -112 is less than 0

The first 2 is immediately at start, the last 2 (Model size...) are written at the moment of "Add images" !