After following instructions for HA installation I can't access the UI

Hello, I’ve followed the steps for setting up a HA cluster from this page:

Everything looks ok, but I can’t access the UI using the FQDN, am I missing something?

I get:

default backend - 404


The troubleshooting steps are described here:

Thanks for your help @superseb! It’s weird but the only thing I see in the logs is:

kubectl --kubeconfig kube_config_rancher-cluster.yml logs -l app=ingress-nginx -n ingress-nginx

error obtaining PEM from secret cattle-system/cattle-keys-ingress: error retrieving secret cattle-system/cattle-keys-ingress: secret cattle-system/cattle-keys-ingress was not found 

SSL certificate "cattle-system/cattle-keys-ingress" does not exist in local store.

it was a problem with the certificates. It’s already working, thanks!

hello.what did you do to solve this trouble exactly?

how did you solve the problem exactly?