In macOS Sonoma, you may see the following orange colored error message:
This is due to macOS Sonoma screensaver related bugs.
We have engineered a fix.
If you are making screensavers for use on macOS Sonoma, please upgrade to version 6.8.8 or later and re-build and re-install your screensaver.
See iScreensaver Designer 6 Release Notes for more info