Failed to start tunnel

[puviyarasantech]

I have all configuration with Twilio But getting error when create publicServerUrl
ngrok
.connect(8080)
.then((url) => {
console.log("==================?",url);
new IvrTester({ ...config, publicServerUrl: url })
.run(call, scenarios)
.then(() => process.exit())
.catch(catchError)
}
)
.catch(catchError);

{
error_code: 103,
status_code: 502,
msg: 'failed to start tunnel',
details: { err: 'remote gone away' }
}