Failed to complete tunnel connection

[pratiksingh94]

I'm getting Link working code [000] and

Failed to complete tunnel connection
The connection to https://17d9-157-41-229-4.ngrok.io/ was successfully tunneled to your ngrok client, but the client failed to establish a connection to the local address [localhost:3333](http://localhost:3333/).

Make sure that a web service is running on [localhost:3333](http://localhost:3333/) and that it is a valid address.

The error encountered was: dial tcp 127.0.0.1:3333: getsockopt: connection refused

Please help.