If the error popped up but the project is still responsive, . Saving in a corrupted state may permanently damage the AEP file.
After Effects is trying to generate a property (like a slider or checkbox) but encounters a data type it does not recognize. Instead of crashing immediately, it throws the "unknown property of type 'fix'" error, often getting stuck in an infinite loop. If the error popped up but the project is still responsive,
If the error happens spontaneously or when opening a specific project, your preference file may be corrupt. Instead of crashing immediately, it throws the "unknown
Navigate to the folder (typically found in Support Files/Scripts/ScriptUI Panels on Windows or Applications/Adobe After Effects/Scripts/ScriptUI Panels on macOS). The After Effects error message "" typically indicates
The After Effects error message "" typically indicates a conflict between the software and a specific script, third-party plugin, or a corrupted project property. This error often prevents users from opening a project entirely or pops up repeatedly during startup. Common Causes of the Error