Install alidns-webhook fail

[fengmingxing]

k8s version: v1.16.9-aliyun.1
cert-manager version: 1.1
when i do "kubectl apply -f https://raw.githubusercontent.com/pragkent/alidns-webhook/master/deploy/bundle.yaml"
some error happen like:

serviceaccount/alidns-webhook created
role.rbac.authorization.k8s.io/alidns-webhook created
rolebinding.rbac.authorization.k8s.io/alidns-webhook created
rolebinding.rbac.authorization.k8s.io/alidns-webhook:webhook-authentication-reader created
clusterrolebinding.rbac.authorization.k8s.io/alidns-webhook:auth-delegator created
clusterrole.rbac.authorization.k8s.io/alidns-webhook:domain-solver created
clusterrolebinding.rbac.authorization.k8s.io/alidns-webhook:domain-solver created
service/alidns-webhook created
deployment.apps/alidns-webhook created
apiservice.apiregistration.k8s.io/v1alpha1.acme.yourcompany.com created
unable to recognize "bundle.yaml": no matches for kind "Issuer" in version "cert-manager.io/v1"
unable to recognize "bundle.yaml": no matches for kind "Certificate" in version "cert-manager.io/v1"
unable to recognize "bundle.yaml": no matches for kind "Issuer" in version "cert-manager.io/v1"
unable to recognize "bundle.yaml": no matches for kind "Certificate" in version "cert-manager.io/v1"

Is this a bug or feature?

[pragkent]

Please install cert-manager first.
You can find document here