Namespaces "kube-system" is forbidden

I’m having a problem when I install ebs-csi-driver for AWS EKS
I used the account with administratoraccess to install via was console but had an error “namespaces “kube-system” is forbidden: User “eks:addon-manager” cannot patch resource “namespaces” in API group “” in the namespace “kube-system””
I don’t know why the administrator permission can not install add-on.
I also tried to create IAM role but follow Link but receive error : Error from server (NotFound): serviceaccounts “ebs-csi-controller-sa” not found

I just started with Kubernetes so don’t know how t resolve,
Anyone can help ?