Error from server (NotFound): services "cortex-nginx" not found

[xiangzhuyuan]

Hi there, I am following https://cortexmetrics.io/docs/getting-started/ to learn how to run cortex on k8s way, when follow this cmd

# Port forward to the alertmanager to configure recording rules and alerts
$ kubectl --namespace cortex port-forward svc/cortex-nginx 8080:80 &

I got a error that

Error from server (NotFound): services "cortex-nginx" not found

I am not sure how to fix it, checked little bit, I guess I need update some configs inside cortex-values.yaml
but not sure now. anyone got same issue, and how to fix?

[dsabsay]

Could you list the services you have in the cortex namespace?