Isaac object detection with unity3d

hello,
i am trying the object detection with isaac sdk and isaac unity 3d https://docs.nvidia.com/isaac/isaac/packages/detect_net/doc/detect_net.html
when i use bazel run packages/ml/apps/generate_kitti_dataset
i receive 2021-03-04 15:15:40.468 INFO packages/engine_tcp_udp/components/TcpSubscriber.cpp@163: Successfully connected to remote (localhost:55000). Will start receiving.
i run the unity scenario and nothing happens it won’t generate my data also in localhost:3000 the result of the generator is black window.

any idea ?