Tavus Avatar Integration Not Working #44

I'm trying to get the Tavus Avatar Integration running locally by following the instructions in
https://github.com/livekit-examples/python-agents-examples/tree/main/avatars/tavus

In the browser, my voice gets through correctly (I see correct transcripts appearing in the browser), but I don't hear any response in return. I also don't see any video window.

On the terminal side, the logs get stuck at

2025-08-05 13:04:17,420 - DEBUG livekit.agents - received user transcript {"user_transcript": "Hello?", "language": "en-US", "pid": 82967, "job_id": "AJ_ekQ4C6urRGVJ"}
2025-08-05 13:04:19,373 - DEBUG livekit.agents - waiting for the remote participant {"identity": "tavus-avatar-agent", "pid": 82967, "job_id": "AJ_ekQ4C6urRGVJ"}

I don't see any error messages, so I'm unable to figure out where the issue lies. Help would be appreciated.