After Effects error: Crash in progress.

After Effects After Effects error: Crash in progress. Last logged message was: <20424> <RenderTaskManager> <5> Multithreaded render report Total duration: 6.87942 seconds Render threads used: 2 Frames rendered: 962 Frame render avg time(per thread): 0.0089506 seconds Total frames per second: 139.837 Total per-thread time in big mutex: 0 seconds Render context creation overhead time(per thread): 0.0001 seconds Starting concurrency: 2 Max allowed concurrency: 2 Thread - safe effects used: ADBE Drop Shadow Non-thread-safe effects used: <none>