Forbidden to create ingress for normal user

Hi all,
I have installed Traefik in Kubernetes according to Traefik documentatio
All works well and, as an 'admin' I am able to create an ingress object and reach it from the outside.

We want to create 'limited' users who only have access to a namespace. These users cannot create an ingress. They get the following error:

Error from server (Forbidden): error when creating "/tmp/stg-ingress.yaml": ingresses.networking.k8s.io is forbidden: User "simpleuser" cannot create resource "ingresses" in API group "networking.k8s.io" in the namespace "civ-scorewater-stg"

when I apply the same manifest (/tmp/stg-ingress.yaml) as the 'admin' user, then the manifest just gets created. Ingress manifest:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: orion
  namespace: civ-scorewater-stg
  annotations:
    traefik.ingress.kubernetes.io/router.entrypoints: websecure
    traefik.ingress.kubernetes.io/router.tls: "true"
spec:
  tls:
   - hosts: 
     - host.comain.com
     secretName: domain-secret
  rules:
  - host: host.domain.com
    http:
      paths:
      # Path-based routing settings:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: orion
            port:
              number: 1026

These are the rights for the 'simpleuser':

---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: civ-stg-scorewater-devs
  namespace: civ-stg-scorewater
rules:
- apiGroups: ["", "extensions", "apps"]
  resources: ["*"]
  verbs: ["*"]
- apiGroups: ["batch"]
  resources:
  - jobs
  - cronjobs
  verbs: ["*"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: simpleuser
  namespace: civ-scorewater-stg
subjects:
- kind: User
  name: simpleuser
  apiGroup: rbac.authorization.k8s.io
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: civ-stg-scorewater-dev

Anyons knows how to grant the proper rights to the 'simpleuser' user?