I can't play my level sequencer with animation. How do I fix this?

Hey guys!

I’m new to UE4 and I’m having trouble playing my sequence created with CameraActor. My scene was created from a TopDownTemplate. I deleted what came in it and added geometries, Lights and the Camera. But when entering game mode, the sequence does not occur and the image is static. In addition, some items in yellow appear on the Outliner, such as GameNetWorkManager, GameSession, GameStateBase, HUD, ParticleEventManager, PlayerCameraManager, PlayerStartPIE, PlayerState, TopDownController and TopDownGameMode.