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

: ScriptUI panels or presets (like old versions of Magic Bullet Looks) trying to call internal UI elements that no longer exist.

Code is trying to apply a 2D position property to a 3D layer, or vice versa, causing a type mismatch.

Move all .jsx or .jsxbin files out of this folder and place them temporarily on your desktop. : ScriptUI panels or presets (like old versions

While in Safe Mode, immediately go to File > Dependencies > Collect Files to create a clean copy of your assets without plugins.

The "After Effects error asked to create unknown property of type" error is a common issue that occurs in Adobe After Effects, a popular digital visual effects, motion graphics, and compositing software. This error typically arises when you're trying to access or modify a property that doesn't exist or is not recognized by the software. While in Safe Mode, immediately go to File

The error frequently involves "pseudo-effects," which are custom controls created by developers. If After Effects cannot find the definition for these custom properties, it triggers the warning.

Sometimes this is just a playback hiccup. The error frequently involves "pseudo-effects

Let After Effects automatically parse and rewrite the outdated code structure.

Hold down Ctrl+Alt+Shift (Windows) or Command+Option+Shift (Mac) while launching the program.

The "Asked to create unknown property of type" error typically occurs when After Effects is unable to recognize or access a specific property or attribute. This can happen due to various reasons, such as:

The is intimidating but rarely fatal. In the vast majority of cases, a third-party plugin or a single corrupt text layer is to blame. By systematically isolating variables—starting with Safe Mode, then plugins, then project repair—you can recover your work within 15–20 minutes.