----------------------------- **While I generate an answer, here are some sources that might be helpful**: * [Call Ended Reason]() * [Create Phone Call]() * [Get Call]() * [List Calls]() -----------------------------

### Answer The issue you're experiencing, indicated by the

pipeline-error-playht-voice-failed

, typically suggests a complication with the PlayHT voice setup or service. This might involve configuration issues or limitations with your current plan, potentially exhausting the credits or encountering restrictions on specific voice models. To resolve this, you should first check the status of your PlayHT account, specifically looking for any limits or quotas that might have been reached. Additionally, verifying the configuration settings for the PlayHT voice used in your application might reveal discrepancies or needed adjustments. If the problem persists despite these checks, consider reaching out to PlayHT for more detailed support or exploring alternative TTS providers that are compatible with Vapi's system if the issue is related to specific voice models not supported or having recurring issues [(1)]() .

Hm but even when we use the UI, the calls fail for the same reason. For example, this call ID ac37e39b-7179-4dc1-a70e-833fa6174620