Update app.py

app.py

@@ -201,8 +201,11 @@ class RAGVoiceHandler(AsyncStreamHandler):
 # 4. Voice Streaming Setup & FastAPI Endpoints
 # ====================================================
 
-# When running on Hugging Face Spaces, we bypass the Twilio TURN credentials by setting rtc_configuration to None.
-rtc_config = get_twilio_turn_credentials() if not get_space() else None
+# When running on Hugging Face Spaces, supply a dummy RTC configuration.
+if get_space():
+    rtc_config = {"iceServers": [{"urls": "stun:stun.l.google.com:19302"}]}
+else:
+    rtc_config = get_twilio_turn_credentials()
 
 # Create a Stream instance using our RAGVoiceHandler.
 stream = Stream(