Hi, I think the current code
actor_in_world = unreal.GameplayStatics.get_all_actors_of_class(unreal.EditorLevelLibrary.get_editor_world(), unreal.SkeletalMeshActor)()[0]
should be corrected to
actor_in_world = unreal.GameplayStatics.get_all_actors_of_class(unreal.EditorLevelLibrary.get_editor_world(), unreal.SkeletalMeshActor)[0]