You could also try an older version of Ubuntu or https://ubuntu-mate.org/about/ which is a fork of GNOME-2 (MATE) on Ubuntu.
I haven't used Ubuntu MATE (https://ubuntu-mate.org) but it may have the necessary GTK2 libs. > I don't know enough about GTK but in your case I'd check whether the old > GTK+-2.0 > canberra-gtk-module is installed on your Ubuntu system. Basically gst-browser is not broken, but the OS Ubuntu you are using, may be missing some installed libraries or desktop environment ... In my opinion "gst-browser" (VisualGST) is a nice addition to GNU Smalltalk, but it does not seem essential in the GNU smalltalk philosophy, of a basic Smalltalk on top of Emacs/CLI etc.
