ArgoCD deploy app-of-apps to remote cluster

I'm trying to deploy the following app-of-apps core-services to my development cluster. I only have one ArgoCD instance in a control cluster where I want to deploy this app-of-apps pattern to my remote clusters. The app-of-apps pattern looks like this:

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: core-services-development
#  namespace: argocd
spec:
  project: default
  destination:
    name: japasp-development-cluster
#    namespace: argocd
  source:
    repoURL: git@gitlab.com:REDACTED/gitops/argocd.git
    path: environments/development/apps/core-services
    targetRevision: main
  syncPolicy:
    automated:
      allowEmpty: true
      prune: true
      selfHeal: false

My core service app pattern, for example external-dns, looks like this:

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: external-dns
#  namespace: argocd
  finalizers:
  - resources-finalizer.argocd.argoproj.io
spec:
  project: default
  destination:
    name: japasp-development-cluster
    namespace: external-dns
  source:
    repoURL: https://charts.bitnami.com/bitnami
    chart: external-dns
    targetRevision: 6.31.6
    plugin:
      name: argocd-vault-plugin-helm
      env:
        - name: HELM_VALUES
          value: |
            replicaCount: 3
            resources:
              requests:
                cpu: 10m
                memory: 50Mi
              limits:
                cpu: 10m
                memory: 50Mi
            sources: ['ingress']
            provider: cloudflare
            cloudflare:
              apiToken: <path:kv2/data/cloudflare/api/external-dns#all-domains>
              proxied: false          
  syncPolicy:
    automated:
      prune: true
      selfHeal: false
      allowEmpty: false
    syncOptions:
      - CreateNamespace=true

When I try to sync it I get the following error:

The Kubernetes API could not find argoproj.io/Application
for requested resource /cert-manager. Make sure the
"Application" CRD is installed on the destination cluster.

Whats wrong here?

I tried to play around with the namespaces but I messed up my control-cluster where these core services are deployed too.

The Application CR is only defined in your "control" cluster but you're trying to deploy an Application in your "development" cluster, hence the error.

In an apps-of-apps pattern, you want to deploy the apps definition in the "control" cluster. Only the "final" resources must be deployed in your "development" (or other) cluster.

If core-services GitOps directory contains only Application definitions, then you want the destination of core-services-development to be the "control" cluster.