"asked to create unknown property of type" in Adobe After Effects typically occurs when the software encounters a script, preset, or template that references a property or "pseudo-effect" it doesn't recognize or can't access. Common Causes & Fixes Missing Plugins or Presets
If the error popped up but the project is still responsive, do not hit Ctrl+S (Cmd+S). Saving in a corrupted state may permanently damage the AEP file. "asked to create unknown property of type" in
The "Asked to Create Unknown Property" error is a common headache for Adobe After Effects users. It usually pops up when the software encounters data it doesn't recognize within a project file. This often happens when moving projects between different versions of After Effects or when using third party plugins. If you are stuck with this error, here is how to resolve it. Understand the Cause Identify the Properties: The "Asked to Create Unknown
The most effective way to resolve this is to identify the script causing the conflict: Locate the Scripts Folder: "asked to create unknown property of type" in
What is the "Asked to Create Unknown Property of Type" Error?
Other applications running in the background might interfere with After Effects, especially if they're using a lot of system resources or interacting with similar file types. Try closing other apps and see if that resolves the issue.