After Effects Error Asked To Create Unknown Property Of Type Fix Online

: In rare cases, "Unknown Exception" errors are caused by missing or corrupt fonts that the script is trying to load for its UI.

: Ensure all required plugins are installed and updated. If the preset came with a tutorial or documentation, double-check for "pseudo-effects" you were supposed to install first. Outdated Expressions

If none of the above solutions work, you can try reinstalling After Effects.

: Upon opening, the system would scan for all custom pseudo-effects and prompt a download/link for missing ones.

This is especially common in After Effects Beta versions, where, as noted by the After Effects Engineering Team, deleting the ModifiedWorkspaces and OriginalUserWorkspaces folders in the preferences can resolve the issue.

After Effects will treat the old project structure as an asset folder, allowing you to salvage your individual compositions without activating the bugged sequence on startup. Diagnostic Check Checklist asked to create unknown property of type - Adobe Community

A third-party script is trying to generate a parameter or keyframe that is invalid for that specific type of layer.

If the project file itself is slightly corrupted, you can often bypass the error by importing it into a fresh workspace rather than opening it directly. Open After Effects and create a brand new project. Go to File > Import > File. Select the problematic .aep file.

The "After Effects error asked to create unknown property of type" error can be frustrating, but it's not insurmountable. By understanding the causes and symptoms of the error, you can troubleshoot and fix the issue using the solutions provided in this article. Remember to take preventive measures to avoid encountering this error in the future. If you're still experiencing issues, feel free to comment below, and we'll do our best to help.

This error usually prevents the action from completing and may sometimes cause the application to become unstable or crash.

: Documents\Adobe\After Effects [Version]\User Presets\ Mac : Documents/Adobe/After Effects [Version]/User Presets/

C:\Program Files\Adobe\Adobe After Effects (Your Version)\Support Files\Scripts\ScriptUI Panels