issue while deploying applicationset using list generator in argocd

Question

I am deploying application set using list generator in argocd. My yaml is as below,

apiVersion: argoproj.io/v1alpha1
kind: ApplicationSet
metadata:
  name: guestbook
  namespace: default
spec:
  generators:
  - list:
      elements:
      - cluster: local-cluster
        url: https://kubernetes.default.svc
      - cluster: test-eks-remote
        url: https://xxxx.xx.ap-south-1.eks.amazonaws.com
  template:
    metadata:
      name: '{{cluster}}-guestbook'
      namespace: default
    spec:
      project: default
      source:
        repoURL: https://github.com/hardikpatel29/argocd-examples.git
        targetRevision: master
        path: guestbook
      destination:
        server: '{{url}}'
        namespace: guestbook
      syncPolicy:
         syncOptions:
          - CreateNamespace=true

when I am hitting

kubectl apply -f applicationset-list-generator.yaml

getting error

resource mapping not found for name: "guestbook" namespace: "default" from "applicationset-list-generator.yaml": no matches for kind "ApplicationSet" in version "argoproj.io/v1alpha1" ensure CRDs are installed first

what have i missed?