ERRO export KUBERNETES_PROVIDER = aws; curl -sS https://get.k8s.io | bash

I'm running on AWS EC2 Getting started, command:

export KUBERNETES_PROVIDER = aws; curl -sS https://get.k8s.io | bash

But the error occurs:

But the error occurs "salt-master failed to start on 52.24.95.100 Your cluster is unlikely to work Correctly. Please run ./cluster/kube-down.sh and re-create the cluster. (sorry!) 

Any suggestion?