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

Move all files out of the ScriptUI Panels folder to a temporary folder on your desktop.

If this error appears immediately after running a script (like a motion graphics toolkit or a rigging tool): Move all files out of the ScriptUI Panels

If the project uses expressions from older versions of After Effects, the engine may struggle to read them. Go to File > Scripts > Update Legacy Expressions.jsx to automatically update them to the modern engine. Remove Conflicting Scripts: Remove Conflicting Scripts: The Adobe Support Community and

The Adobe Support Community and forums are great resources. Someone else might have encountered the same issue and found a solution. Move all files out of the ScriptUI Panels

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: