sj
03/27/2025, 3:05 PMVapi Support Bot
03/27/2025, 3:08 PMfirstMessageInterruptionsEnabled
property in relation to Nova 3 General. However, I can help with understanding similar errors and how to resolve them, plus explain why web calls might be failing.
Based on the information I found, this error occurs because the firstMessageInterruptionsEnabled
property is not supported or allowed when using Nova 3 General as your transcriber. Here's how to fix it:
## How to Fix the Error
The most direct solution is to remove the firstMessageInterruptionsEnabled
property from your assistant's JSON configuration. According to [similar error cases](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1338868888879890432), these "property should not exist" errors (status code 400) are resolved by removing the unsupported property.
## Why Web Calls Are Failing
Several users have reported web call failures specifically when using Nova 3 General. Here are the likely causes:
1. **Network Errors with Deepgram**: Users have reported receiving "Transcriber failed (reason: Received network error or non-101 status code.)" when using Nova 3 with Deepgram, which also prevented web calls from working ([source](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1341448950229762219)).
2. **Language Support Limitations**: Nova 3 only supports English language ("en" or "en-US"). If your configuration has a different language setting, it can cause errors ([source](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1341463939246198784)).
3. **Code Switching Incompatibility**: If you have codeSwitchingEnabled
set to true
, this will cause issues as it's not compatible with Nova 3 ([source](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1341463939246198784)).Vapi Support Bot
03/27/2025, 3:08 PMjson
{
"transcriber": {
"model": "nova-3",
"language": "en-US",
"provider": "deepgram",
"endpointing": 300
},
"startSpeakingPlan": {
"smartEndpointingEnabled": true,
"waitSeconds": 0.8
}
}
The default Deepgram endpointing value of 10ms is often too aggressive and can cause issues, so increasing it to 300ms is recommended ([source](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1343636482874933340)).
Is there anything else you'd like to know about configuring Nova 3 General or troubleshooting these errors?
Sources:
- [Discord conversation about similar error](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1338868888879890432)
- [Discord conversation about Nova 3 web call failures](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1341448950229762219)
- [Discord conversation about Nova 3 language support](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1341463939246198784)
- [Discord conversation about Deepgram endpointing](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1343636482874933340)sj
03/27/2025, 3:15 PMsj
03/27/2025, 3:15 PMShubham Bajaj
03/27/2025, 6:38 PMJack
03/27/2025, 7:21 PMShubham Bajaj
03/28/2025, 1:32 AMFloris
03/28/2025, 2:41 PMShubham Bajaj
03/28/2025, 4:12 PMJack
03/28/2025, 6:39 PMShubham Bajaj
03/29/2025, 2:12 PM