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After Effects Error Asked To Create Unknown Property Of Type Fix

Try moving scripts out of this folder one by one to identify the "troublemaker". Change the Expression Engine:

Many advanced project templates use legacy JavaScript syntax that contemporary execution environments fail to translate properly. Head to the top menu and select . Navigate to the Expressions tab. Locate the Expressions Engine dropdown selection. Try moving scripts out of this folder one

, simply closing the extension panel and reopening it can reset the "boot" process and clear the error. Identification Tip Navigate to the Expressions tab

If the error occurs immediately upon loading an old project file or template, it is likely caused by outdated expression components. You can automate the repair using native tools: Identification Tip If the error occurs immediately upon

Many scripts require specific layers to be selected.

Always use the expression pickwhip to create references. Typing them manually often leads to spelling mistakes.

Try removing all scripts and re-adding them one by one to find the culprit.