: If expressions are the culprit, try changing the engine. Go to File > Project Settings > Expressions and toggle between JavaScript and Legacy ExtendScript .
Click "Yes" when asked if you want to delete the preferences file. Step 5: The "New Project" Import Trick : If expressions are the culprit, try changing the engine
A known bug where using dropdown menu controls in master properties can trigger this error during startup. How to Fix Error: asked to created unknown property of type "x" (1d16) 21 Jun 2022 — Step 5: The "New Project" Import Trick A
Before reopening After Effects after encountering the error, run through this checklist: run through this checklist: However
However, I can offer some general troubleshooting steps and potential fixes that might help resolve or at least help you troubleshoot the issue:
: Go to File > Scripts > Update Legacy Expressions.jsx to fix older expression syntax that might be confusing the newer engine .