Websocket connection to listen to call doesn't work. Throws error 500: " Handshake status 500 Internal Server Error -+-+- {'content-type': 'application/json', 'content-length': '20', 'date': 'Thu, 24 Apr 2025 09:56:58 GMT', 'connection': 'close'} -+-+- b'failed to route call' " Anynone experiencing the same issue?

To troubleshoot your "failed to route call" error, verify if the

listenUrl

is still valid as these URLs can expire. Try testing the connection directly with a tool like `wscat`:

wscat -c wss://aws-us-west-2-production1-phone-call-websocket.vapi.ai/<your-call-id>/transport

If this fails, the URL may have expired or there could be network restrictions blocking the connection. Source: - [Discord Channel](https://discord.com/channels/1211482211119796234/1329235631855108128)

I fixed it. The problem is that vapi had specific errors for when phone call wasn't picked up yet after listenUrl was created and I watched for a specific exception and then retry connection

except (websocket.WebSocketConnectionClosedException, 
                websocket.WebSocketTimeoutException, 
                ConnectionRefusedError)

in python I put those exceptions to tell my backend to retry connection until it works But now, instead of that, it throws a generic handshake 500 error, and my backend never retried. so instead of checking for a specific exception to retry, I just retry no matter what, since it's generic 500 error now

Nice