After Effects Error Asked To Create Unknown Property Of Type Fix

A prompt will ask if you want to delete your preferences file; click . Leverage Safe Mode Troubleshooting

Adobe added a Safe Mode to After Effects starting with version 22.0. This disables all third-party plugins and scripts. A prompt will ask if you want to

Corrupted application memory data blocks will persistently call up non-existent property configurations. You are using a plugin (like Red Giant

: If Safe Mode resolves the error, navigate to your startup script folders to find the culprit: Video Copilot Element 3D

: Open a new, blank AE project, then go to File > Import > File and select your problematic .aep file. Remove Conflict-Causing Scripts Some scripts loaded at startup can trigger this error.

You are using a plugin (like Red Giant Trapcode, Video Copilot Element 3D, or a script like Duik Bassel). The plugin creates "Pseudo Effects" (custom user interfaces). If the plugin version mismatches the project version, or the plugin is missing, AE cannot create the UI property.