LDAP is not working for Nexus behind istio

Related to #1115 (closed).

I have deployed Bigbang Release 1.25.1. I have a LDAP server (FreeIPA) outside of the kubernetes cluster. I am trying to setup LDAP integration for Nexus. But I am running into this issue when trying to apply network policy to open up ports(636) using this.

addons:
  nexus:
    postRenderers:
      - kustomize:
          patchesStrategicMerge:
            - kind: NetworkPolicy
              apiVersion: networking.k8s.io/v1
              metadata:
                name: allow-https-egress
                namespace: nexus-repository-manager
              spec:
                egress:
                - ports:
                  - port: 443
                    protocol: TCP
                - ports:
                  - port: 636
                    protocol: TCP