Camera node not found. Check the input glTF file "..."

[NerdToMars]

Error

after adding debug text, the error seems from following code in server.py

            self._blender.render_image(params=params, output_path=output_path)

the error message returned from srv to client is 500:

Server Message:  {"code":500,"error":true,"message":"Internal server error in _render_endpoint: FileNotFoundError(2, 'No such file or directory')"}

no such file due to render_image did not generate png to the output_path on srv side.

Package version

name = "drake"
version = "1.46.0"

[[package]]
name = "drake-blender"
version = "0.3.0.dev0"

[[package]]
name = "bpy"
version = "4.0.0"

Code

#  modified from steerable scene generation

for scene in unnormalized_scene:
        # Visualize scene.
        builder = DiagramBuilder()
        result = create_plant_and_scene_graph_from_scene(
            scene=scene,
            builder=builder,
            scene_vec_desc=scene_vec_desc,
            weld_objects=weld_objects,
            time_step=0.0,
        )


        # Get camera pose based on scene type.
        X_WC = _determine_camera_pose(
            model_paths=result.object_model_paths,
            object_transforms=result.object_transforms,
            scene_vec_desc=scene_vec_desc,
            camera_poses=None,
        )

        # Add camera.
        camera_config = CameraConfig(
            X_PB=Transform(X_WC),
            width=camera_width,
            height=camera_height,
            background=Rgba(
                background_color[0], background_color[1], background_color[2], 1.0
            ),
            renderer_class=(
                RenderEngineGltfClientParams(base_url=blender_server_url, verbose=True)
            ),
        )
        ApplyCameraConfig(
            config=camera_config,
            builder=builder,
            plant=result.plant,
            scene_graph=result.scene_graph,
        )
        builder.ExportOutput(
            builder.GetSubsystemByName(
                f"rgbd_sensor_{camera_config.name}"
            ).color_image_output_port(),
            "rgba_image",
        )

        diagram = builder.Build()
        context = diagram.CreateDefaultContext()

        rgba_image = copy.deepcopy(diagram.GetOutputPort("rgba_image").Eval(context).data)
        Image.fromarray(rgba_image).save("visualized_scene.png")
        print(f"Saved rendered image to visualized_scene.png.")

I am not sure where "Camera Node" should be written to *.glTF file? or should I create a *.blender project which contains a "Camera Node" ? or something wrong with the way I use DiagramBuilder ?