Argocd Ingress not working on a Ubuntu Microk8s cluster

I have a working Microk8s cluster. After enabling the argocd community addon, the recommended ingress for argocd sever doesn't seem to be working.

Here's a note I got after enabling the addon:

Infer repository community for addon argocd
Infer repository core for addon helm3
Addon core/helm3 is already enabled
Installing ArgoCD (Helm v4.6.3)
"argo" already exists with the same configuration, skipping
Release "argo-cd" does not exist. Installing it now.
NAME: argo-cd
LAST DEPLOYED: Thu Oct 20 17:34:33 2022
NAMESPACE: argocd
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
In order to access the server UI you have the following options:

1. kubectl port-forward service/argo-cd-argocd-server -n argocd 8080:443

    and then open the browser on http://localhost:8080 and accept the certificate

2. enable ingress in the values file `server.ingress.enabled` and either
      - Add the annotation for ssl passthrough: https://github.com/argoproj/argo-cd/blob/master/docs/operator-manual/ingress.md#option-1-ssl-passthrough
      - Add the `--insecure` flag to `server.extraArgs` in the values file and terminate SSL at your ingress: https://github.com/argoproj/argo-cd/blob/master/docs/operator-manual/ingress.md#option-2-multiple-ingress-objects-and-hosts


After reaching the UI the first time you can login with username: admin and the random password generated during the installation. You can find the password by running:

kubectl -n argocd get secret argocd-initial-admin-secret -o jsonpath="{.data.password}" | base64 -d

(You should delete the initial secret afterwards as suggested by the Getting Started Guide: https://github.com/argoproj/argo-cd/blob/master/docs/getting_started.md#4-login-using-the-cli)
ArgoCD is installed

Additionally, here's the Ingress that I defined:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: argocd-server-ingress
  namespace: argocd
  annotations:
    cert-manager.io/cluster-issuer: lets-encrypt
    kubernetes.io/ingress.class: nginx
    kubernetes.io/tls-acme: "true"
    nginx.ingress.kubernetes.io/ssl-passthrough: "true"
    # If you encounter a redirect loop or are getting a 307 response code
    # then you need to force the nginx ingress to connect to the backend using HTTPS.
    #
    nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
spec:
  rules:
  - host: argocd.DOMAIN.com
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: argo-cd-argocd-server
            port:
              name: https
  tls:
  - hosts:
    - argocd.DOMAIN.com
    secretName: argocd-secret # do not change, this is provided by Argo CD

When I visit the host address, I get this:

From firefox, here's the certificate being issued.

From the notes I got after enabling this addon, how do I do this part enable ingress in the values file server.ingress.enabled this or get my ingress to correctly work?

UPDATE:

Here's what the ingress description looks like:

The Error message did indicate an invalid Certificate which was not accepted by the browser. The ingess configuration requested a certificate and ssl-passthrough which does not fit together. The line kubernetes.io/tls-acme: "true" had to be removed from Ingress and a minor change of the service name.

The TLS connection to ArgoCD is terminated at the ArgoCD Server and not at the ingress GW. ArgoCD uses the Certificate (and Priv Key) stored in the argocd-secret. ingess should look like

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: argocd-server-ingress
  namespace: argocd
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/ssl-passthrough: "true"
    nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
spec:
  rules:
  - host: argocd.<domain>
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service: 
            name: argocd-server
            port:
              name: https
  tls:
  - hosts:
    - argocd.<url>
    secretName: argocd-secret # not relevant

and a kubectl get services must contain a line like

argocd-server     ClusterIP   10.99.19.178   <none>        80/TCP,443/TCP               179d

a kubectl get Ingress -n argocdresults in

NAME                    CLASS    HOSTS                 ADDRESS         PORTS     AGE
argocd-server-ingress   <none>   argocd.k3sxx.xx   192.168.xx.xx   80, 443   15m

and details can be seen with kubectl get Ingress -n argocd -o yaml