skaffold command fails to deploy envoy

[kishore-nikhil]

When following the tutorial and running the following command on a mac

skaffold run \
    --digest-source=none \
    --module=envoy \
    --skip-tests

getting the below error

running [kubectl kustomize /Users/nikhilkishore/Projects/cloud/envoyTutorial/grpc-gke-nlb-tutorial/envoy/k8s]
 - stdout: ""
 - stderr: "Error: json: unknown field \"metadata\"\n"
 - cause: exit status 1