kapp error when KAPP_KUBECONFIG_YAML set to empty about kapp-controller HOT 7 CLOSED

apiVersion: kappctrl.k14s.io/v1alpha1
kind: App
metadata:
  name: ds-tools-jupyterhub
  namespace: default
spec:
  serviceAccountName: cluster-admin-sa
  fetch:
  - image:
        # Docker image url; unqualified, tagged, or
        # digest references supported (required)
        url: docker/image
        # secret with auth details (optional)
        secretRef:
          name: auth
        subPath: ds-tools/jupyterhub
  template:
  - ytt:
        ignoreUnknownComments: true
        strict: false
  deploy:
  - kapp: {}

kind: App
apiVersion: kappctrl.k14s.io/v1alpha1
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: >
      {"apiVersion":"kappctrl.k14s.io/v1alpha1","kind":"App","metadata":{"annotations":{},"name":"ds-tools-jupyterhub","namespace":"default"},"spec":{"deploy":[{"kapp":{}}],"fetch":[{"image":{"secretRef":{"name":"auth"},"subPath":"ds-tools/jupyterhub","url":"docker/image:master.1ef0f8a30ca6d4323d5e7436eae61cc93a466188"}}],"serviceAccountName":"cluster-admin-sa","template":[{"ytt":{"ignoreUnknownComments":true,"strict":false}}]}}
  creationTimestamp: '2020-08-06T13:39:02Z'
  finalizers:
    - finalizers.kapp-ctrl.k14s.io/delete
  generation: 2
  managedFields:
    - apiVersion: kappctrl.k14s.io/v1alpha1
      fieldsType: FieldsV1
      fieldsV1:
        'f:metadata':
          'f:annotations':
            .: {}
            'f:kubectl.kubernetes.io/last-applied-configuration': {}
        'f:spec':
          .: {}
          'f:deploy': {}
          'f:fetch': {}
          'f:serviceAccountName': {}
      manager: kubectl
      operation: Update
      time: '2020-08-06T13:39:02Z'
    - apiVersion: kappctrl.k14s.io/v1alpha1
      fieldsType: FieldsV1
      fieldsV1:
        'f:metadata':
          'f:finalizers': {}
        'f:spec':
          'f:template': {}
        'f:status':
          .: {}
          'f:conditions': {}
          'f:deploy':
            .: {}
            'f:error': {}
            'f:exitCode': {}
            'f:finished': {}
            'f:startedAt': {}
            'f:stderr': {}
            'f:updatedAt': {}
          'f:fetch':
            .: {}
            'f:exitCode': {}
            'f:startedAt': {}
            'f:updatedAt': {}
          'f:friendlyDescription': {}
          'f:inspect':
            .: {}
            'f:error': {}
            'f:exitCode': {}
            'f:stderr': {}
            'f:updatedAt': {}
          'f:observedGeneration': {}
          'f:template':
            .: {}
            'f:exitCode': {}
            'f:updatedAt': {}
      manager: __debug_bin
      operation: Update
      time: '2020-08-06T13:40:36Z'
  name: ds-tools-jupyterhub
  namespace: default
  resourceVersion: '19018'
  selfLink: /apis/kappctrl.k14s.io/v1alpha1/namespaces/default/apps/ds-tools-jupyterhub
  uid: f6079c24-3ff5-4745-a356-9f31a634951b
spec:
  deploy:
    - kapp: {}
  fetch:
    - image:
        secretRef:
          name: auth
        subPath: ds-tools/jupyterhub
        url: >-
         docker/image:master.1ef0f8a30ca6d4323d5e7436eae61cc93a466188
  serviceAccountName: cluster-admin-sa
  template:
    - ytt:
        ignoreUnknownComments: true
status:
  conditions:
    - message: 'Deploying: exit status 1'
      status: 'True'
      type: ReconcileFailed
  deploy:
    error: 'Deploying: exit status 1'
    exitCode: 1
    finished: true
    startedAt: '2020-08-06T13:40:25Z'
    stderr: 'kapp: Error: yaml: line 8: mapping values are not allowed in this context'
    updatedAt: '2020-08-06T13:40:36Z'
  fetch:
    exitCode: 0
    startedAt: '2020-08-06T13:40:23Z'
    updatedAt: '2020-08-06T13:40:24Z'
  friendlyDescription: 'Reconcile failed: Deploying: exit status 1'
  inspect:
    error: 'Inspecting: exit status 1'
    exitCode: 1
    stderr: 'kapp: Error: yaml: line 8: mapping values are not allowed in this context'
    updatedAt: '2020-08-06T13:40:36Z'
  observedGeneration: 2
  template:
    exitCode: 0
    updatedAt: '2020-08-06T13:40:25Z'