[System] Can't install cert-manager with kustomize

Issue

I get a kubectl error when I try to create a certificate with cert-manager.

Description of the bug

Error I try to create a test certficate with kubectl :

Error from server (InternalError): error when creating
"test-resources.yaml": Internal error occurred: failed calling webhook
"webhook.cert-manager.io": failed to call webhook: Post
"https://cert-manager-webhook.cert-manager.svc:443/validate?timeout=30s":
tls: failed to verify certificate: x509: certificate signed by unknown
authority

Error from the webhook pod :

E0830 16:54:55.857471       1 leaderelection.go:436] error retrieving
resource lock kube-system/cert-manager-controller:
leases.coordination.k8s.io "cert-manager-controller" is forbidden: User
"system:serviceaccount:cert-manager:cert-manager" cannot get resource
"leases" in API group "coordination.k8s.io" in the namespace "kube-system

Steps to Reproduce

1. Go to cluster/system/cert-manager/
2. Install the software kubectl kustomize | kubectl apply -f -
3. Create a self sign certificate
4. See error

Additional Information

Self signed certificate :

apiVersion: v1
kind: Namespace
metadata:
   name: cert-manager-test
---
apiVersion: cert-manager.io/v1
kind: Issuer
metadata:
   name: test-selfsigned
   namespace: cert-manager-test
spec:
   selfSigned: {}
---
apiVersion: cert-manager.io/v1
kind: Certificate
metadata:
   name: selfsigned-cert
   namespace: cert-manager-test
spec:
   dnsNames:
     - example.com
   secretName: selfsigned-cert-tls
   issuerRef:
     name: test-selfsigned