An error occurred during a connection to 127.0.0.1
You have set redirect URL in the developer console as local host(127.0.0.1). Which is currently not up/running in your local system. Though, the linked re-direct page is down, as @SRIJAN said, you can still extract the request_token from the re-directed URL.
https://kite.trade/docs/connect/v3/user/