Which exact version of openSuSE are you using?
Which desktop environment are you using?
Which yEd installer were you using?
Do you have Java already installed on your system? If so, which exact version of Java do you have installed?
That said, the yEd installer should not require any special GTK libraries, e.g. it works fine on our Ubuntu 16.04 64bit test machine with GNOME 3.18 desktop environment.
Still, try running the installer with the command line option
to force the installer to use a different UI.