That error usually means the Speechmatics transcription connection is failing, so Vapi ends the call because it can’t establish or maintain real-time speech recognition. It’s often caused by a temporary provider issue, bad config/credentials, or network/WebSocket instability between Vapi and Speechmatics. If it’s happening consistently, switching STT provider briefly can help confirm if it’s Speechmatics-specific or a broader integration issue.
@Nisar