So doing some C4D tracker > UE sequencer, and for whatever reason UE hates the Datasmith information for the camera solver it brings in and refuses to save. Keeps pointing to the MovieScene_0.CineCameraActor_0.CameraComponent despite all relevant actors being deleted, and says “(referenced because it is an archetype object)”.:
Ironically the only way to save the level is to delete the literal camera solver cine actor with my tracking data lol, putting me back to nowhere.