Create Unknown Property Of Type Fix !!hot!! — After Effects Error Asked To

If the error is caused by an old template, you can often fix it by converting the expressions to the modern engine: File > Scripts > Update Legacy Expressions.jsx Alternatively, go to File > Project Settings > Expressions and change the Expressions Engine to Legacy ExtendScript 2. Troubleshoot Scripts and Plugins Isolate Scripts : Remove scripts from the ScriptUI Panels

If AE opens correctly, add your scripts back one by one until the error reappears to find the "troublemaker". 2. Refresh Extensions (For Motion v4 & Similar) If the error is caused by an old

Sometimes cached frames or internal data structures cause property conflicts. If the error is caused by an old

If the project was created in a much older version of After Effects, the expressions might need a syntax update. If the error is caused by an old