Unable to create app with nested kustomize configs: multiple application sources defined: Kustomize,Directory

[Fak3]

In the repository https://github.com/Fak3/elect_hotline_deploy, my project has following structure:

base
├── kustomization.yaml
└── metrics
    └── grafana
        ├── dashboard-cluster.json
        ├── dashboard-django.json
        ├── grafana.yml
        └── kustomization.yml

Root kustomization.yaml has single line: resources: [ metrics/grafana/ ] which points to the nested metrics/grafana/ kustomize directory. I can successfully apply this project with kubectl apply -k base/.

But when i try to import the same git project into ArgoCD, I get the following error:

Unable to create application: error while validating and normalizing app: error validating the repo: error verifying source type: multiple application sources defined: Kustomize,Directory

To Reproduce

1. Go to argocd web interface, click "New App"
2. In this app creation dialog, fill this source git repo: https://github.com/Fak3/elect_hotline_deploy.git and source path base.
3. Click "Create"

Result: error

Expected behavior

I expect argocd to create new app, with specified manifests, just like kubectl apply -k does.

Version

argocd: v2.14.2
  BuildDate: 2025-02-07T17:53:26Z
  GitCommit: v2.14.2
  GitTreeState: clean
  GitTag: v2.14.2
  GoVersion: go1.23.6
  Compiler: gc
  Platform: linux/amd64
argocd-server: v2.14.2+ad27246
  BuildDate: 2025-02-05T23:44:17Z
  GitCommit: ad2724661b66ede607db9b5bd4c3c26491f5be67
  GitTreeState: clean
  GoVersion: go1.23.3
  Compiler: gc
  Platform: linux/amd64
  Kustomize Version: v5.4.3 2024-07-19T16:40:33Z
  Helm Version: v3.16.3+gcfd0749
  Kubectl Version: v0.31.0
  Jsonnet Version: v0.20.0