Failed calling webhook

Hello,

Red Hat Enterprise Linux release 9.4 (Plow)
RKE2 v1.28
Rancher 2.8.5

After having installed rke2 master cluster with three nodes successfully, I failed to install rancher with the following errors at step 5. Install Rancher with Helm and Your Chosen Certificate Option of the formal link named “Install/Upgrade Rancher on a Kubernetes Cluster” at Rancher v2.8 site

[root@01lts-k8master01 ~]# helm install rancher rancher-stable/rancher
–namespace cattle-system
–set hostname=rancher-test.sbmdc.org.tr
–set bootstrapPassword=admin
Error: INSTALLATION FAILED: 2 errors occurred:
* Internal error occurred: failed calling webhook “validate.nginx.ingress.kubernetes.io”: failed to call webhook: Post “https://rke2-ingress-nginx-controller-admission.kube-system.svc:443/networking/v1/ingresses?timeout=10s”: context deadline exceeded

Search for the errors further, but found nothing useful so far
Your help would be appreciated


Cheers,
Nihat