I am installing vitess in minikube. I am following the instructions for vitess installation in kubernetes, section: 6. Use vtctlclient to send commands to vtctld. I am getting the below error:

root@twinkle:~/go/src/vitess.io/vitess/examples/kubernetes# ./kvtctl.sh
Starting port forwarding to vtctld...
E1117 00:00:36.982524    4189 main.go:63] Remote error: rpc error: code = Unavailable desc = transport is closing
root@twinkle:~/go/src/vitess.io/vitess/examples/kubernetes#

I am stuck. Can anyone help here ?