After Effects Error Asked To Create Unknown Property Of Type Fix [better] Link

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

Click "Yes" when asked if you want to delete the preferences file. Step 5: The "New Project" Import Trick

How to Fix the After Effects Error: "Asked to Create Unknown Property of Type"

This error typically stems from a version mismatch or a missing dependency. When After Effects opens a file, it builds a database of properties. If it finds a property tag that isn't defined in its current library, the system stalls. Common triggers include:

Install the required third-party software (e.g., Trapcode, Element 3D, or Sapphire).

If you don't need the effect, delete the missing effect layer and resave the project. Step 3: Purge Memory and Disk Cache