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

If the project file itself is corrupted or stuck in a loop, importing it as a piece of footage into a fresh project can bypass the launch error.

Open the After Effects Console by going to Window > Console (or pressing Ctrl+Shift+Alt+C on Windows, Cmd+Shift+Option+C on Mac). Look for red text. Often, the console will name the specific layer or effect causing the "fix" request. If the project file itself is corrupted or

FAQ: How to fix "Unknown BIB Error" in After Effects | Community Console (or pressing Ctrl+Shift+Alt+C on Windows

The infamous "unknown property" error in After Effects! If the project file itself is corrupted or

: Sometimes conflicts with the GPU can cause property errors. Try switching your renderer to Mercury Software Only File > Project Settings > Video Rendering and Effects

: /Applications/Adobe After Effects (version)/Scripts/ScriptUI Panels