How to debug CSS optimization warnings
CSS optimization errors are very rare. They are usually caused by custom code components using private Framer APIs, or might indicate a bug in Framer.
If you see this error:
Check if there’s an update available for components, and update them. In Aug-Sep 2025, Framer has released an new CSS optimizer. This optimizer isn’t compatible with some older versions of some components, such as Code Block from Framer
Reach out to Framer Support if all components are up-to-date, and the issue still persists