After Effects Error Asked To Create Unknown Property Of Type Fix Jun 2026

This error often triggers when you open a project or apply a preset that requires a third-party plugin you don't have installed (e.g., Red Giant Universe Boris FX Continuum Update Legacy Expressions:

folder (found in the AE installation directory) and add them back one at a time to find the "troublemaker". Clear User Presets: Navigate to ~/Documents/Adobe/After Effects [Version]/User Presets This error often triggers when you open a