After Effects Error Asked To | Create Unknown Property Of Type !link!

The table below breaks down the technical reasons why this specific error triggers during a motion design session: Error String Variation Primary Root Cause Affected System Component Pseudo/0.05992... (1d16) Missing or corrupted pseudo-effect XML data Third-party custom effect sliders ADBE Vector Graphic - Repeater Badly formatted extendscript or expression syntax Shape layer contents and automated scripting Unexpected data type Third-party plug-in missing on current workstation External rendering suites (e.g., Boris FX, Magic Bullet) Actionable Steps to Resolve the Error 1. Reinstall or Update Missing Plugins

After Effects is telling you that a script or expression tried to reference a property (like a layer effect, transform attribute, or custom data field) that isn't recognized by the application. The "unknown property" could be:

Download the exact plugin version required by the original file creator. after effects error asked to create unknown property of type

"ADBE Mask" , "ADBE Effect" , "ADBE Paint" , etc. Wrong: passing a custom string that AE doesn't recognize.

Just when Alex thought they were going to lose their mind, they stumbled upon a post from a fellow motion graphics designer who had encountered the same error. The designer had discovered that the error was caused by a corrupt property in the project's JSON file. The table below breaks down the technical reasons

If you provide the that triggers the error, I can give a targeted fix.

If the error happens on startup or random actions, a plugin is likely at fault. The "unknown property" could be: Download the exact

As the deadline drew closer, Alex became more and more desperate. They searched online for solutions, but every forum post and tutorial they found seemed to suggest a different fix. Some people suggested deleting the plugin, while others recommended resetting the After Effects preferences.

Alex was confused and frustrated. They had never seen this error before, and they didn't know what it meant. They tried closing and reopening the project, but the error persisted. They even tried reinstalling the plugin, but that didn't help either.

If your error says something like "property of type: PseudoEffectU" or similar technical jargon, it is almost certainly a Pseudo-Effect used by a script or rigging tool (like character rigging tools). You likely need to re-install the script that generated that pseudo-effect.