[Blank New Project] ──> File > Import > File ──> Select Corrupted .aep ──> Rebuild Compositions
: Corrupted preference files can cause unexpected property errors. Reset them by holding Ctrl+Alt+Shift (Windows) or Command+Option+Shift (macOS) while launching After Effects.
If you're still stuck, these advanced methods can help: [Blank New Project] ──> File > Import >
Most often, a script (like Motion v4 ) or a ScriptUI panel is incompatible with your current version of After Effects.
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 "Asked to create unknown property of type"
Post on with:
Plugins like Red Giant Magic Bullet Looks, Boris FX Sapphire, or custom script packages often update their internal property trees. If you open an older project or preset using a newer version of the plugin (or vice versa), After Effects will look for an effect parameter that no longer exists. If you can't find it, press EE on
If you can't find it, press EE on your keyboard to reveal all expressions in the composition. 2. The "Pre-compose" Solution
An expression referencing thisComp.layer("Solid") but the layer has been renamed, deleted, or pre-composed.