Moved to Tumbleweed this week. Currently the screen saver only dims the screens. Trying to launch xScreenSaver Settings fails. I get a bouncing box with a red dot in it, then nothing.
Wayland is a completely different window system that is intended to replace X11. After 14+ years of trying, some Linux distros have finally begun enabling it by default. Most deployments of it also include XWayland, which is a compatibility layer that allows some X11 programs to continue to work within a Wayland environment.
Unfortunately, XScreenSaver is not one of those programs.