Failing at first hurdle on "Getting Started with DeepStream for Video Analytics on Jetson Nano"

I am trying to do this course:
Getting Started with DeepStream for Video Analytics on Jetson Nano

I am running the first notebook, “01_ObjDetect.ipynb” and when I run the second code cell I get the following error:

# Run the app
%cd /home/dlinano/deepstream_sdk_v4.0.2_jetson/sources/apps/dli_apps/deepstream-test1-rtsp_out
!./deepstream-test1-app /home/dlinano/deepstream_sdk_v4.0.2_jetson/samples/streams/sample_720p.h264
/home/dlinano/deepstream_sdk_v4.0.2_jetson/sources/apps/dli_apps/deepstream-test1-rtsp_out

 *** DeepStream: Launched RTSP Streaming at rtsp://localhost:8554/ds-test ***

Now playing: /home/dlinano/deepstream_sdk_v4.0.2_jetson/samples/streams/sample_720p.h264
Running...
ERROR from element udpsink: Could not get/set settings from/on resource.
Error details: gstmultiudpsink.c(1278): gst_multiudpsink_configure_client (): /GstPipeline:dstest1-pipeline/GstUDPSink:udpsink:
Could not join multicast group: Error joining multicast group: No such device
Returned, stopping playback
Deleting pipeline

Any ideas how to fix it? I feel I am fighting a major uphill battle trying to get this course to work!

HI
DLI course would be a good start, but to gain more deep understanding I may suggest you refer deepstream online documentation and try some sample code directly on Jetson device. here are online documentation,
Getting started with Deepstream,
https://docs.nvidia.com/metropolis/deepstream/dev-guide/index.html
Deepstream plugins

Deepstream API
https://docs.nvidia.com/metropolis/deepstream/dev-guide/DeepStream%20Development%20Guide/baggage/index.html

Okay, well I’ll give up on the “Getting Started” tutorial and maybe try and do something from scratch myself.

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