Deploy on k3s + traefik fails

[Vetchu]

I'm trying to deploy openproject with the command:

$ helm upgrade --create-namespace --namespace openproject --install openproject openproject/openproject --values openproject-values.yml

With the following values:

ingress:
  enabled: true
  ingressClassName: traefik  
  annotations:
    kubernetes.io/ingress.class: traefik
    traefik.ingress.kubernetes.io/router.entrypoints: websecure
    traefik.ingress.kubernetes.io/router.tls: "true"

But I get in response:

+ helm upgrade --create-namespace --namespace openproject --install openproject openproject/openproject --values openproject-values.yml
Release "openproject" does not exist. Installing it now.
coalesce.go:301: warning: destination for memcached.service.sessionAffinity is a table. Ignoring non-table value ()
Error: 1 error occurred:
        * Internal error occurred: failed calling webhook "validate.nginx.ingress.kubernetes.io": failed to call webhook: Post "https://nginx-ingress-ingress-nginx-controller-admission.ingress-nginx.svc:443/networking/v1/ingresses?timeout=10s": service "nginx-ingress-ingress-nginx-controller-admission" not found

Am I doing something wrong or is support for traefik not there and I need to deploy it outside of chart?

Thanks in advance.

EDIT: forgot to mention that I run this on plain k3s