32504: Voice Conversation: Incomplete Conversation.

This error occurs when an existing voice conversation does not include a Frontline worker participant. Review the conversation and make sure the assigned worker is present before you continue the Frontline voice flow.

• Your Frontline routing configuration did not assign a worker to the conversation.
• The conversation was created directly with the Conversations API instead of through Frontline, so the conversation does not match the structure Frontline expects for voice handling.
• The conversation was created by a Frontline worker or admin, but the worker participant was not added successfully.

• Review your Frontline routing configuration and confirm that it assigns a worker to the conversation.
• Fetch the conversation and inspect its participants to verify that the expected Frontline worker participant exists.
• If the conversation was created outside Frontline or is missing the required worker participant, delete the incomplete conversation and create a new conversation through your Frontline flow.

• Conversation Resource
• Conversation Participant Resource
• Modifying a Conversation, Message, or Participant