Unable to pull nvcr.io/nvidia/riva/speech_squad:1.0.0-b.1

Please provide the following information when requesting support.

Hardware - GPU (A100)
Operating System - RHEL 8.6
Riva Version: 2.12.1
TLT Version (if relevant)

I am trying to deploy following speechsquad application and getting error on docker pull

Application Link:
SpeechSquad — NVIDIA Riva)

github location:

Error:
Failed to pull image “nvcr.io/nvidia/riva/speech_squad:1.0.0-b.1

I am not able to trace this even in ngc catalog as well.