定制eclipse-che工作区时遇到问题

如何解决定制eclipse-che工作区时遇到问题

我正在使用自定义和品牌，但遇到了一些问题，也许有人可以帮助我。 我有这个devfile：从python堆栈中获得的基本devfile，以及我在文档中添加的品牌编辑器：

apiVersion: 1.0.0
Metadata:
  name: python-branding
projects:
  - name: python-hello-world
    source:
      location: 'https://github.com/che-samples/python-hello-world.git'
      type: git
      branch: master
components:
  - id: ms-python/python/latest
    memoryLimit: 512Mi
    type: chePlugin
  - mountSources: true
    memoryLimit: 512Mi
    type: dockerimage
    image: 'quay.io/eclipse/che-python-3.7:nightly'
    alias: python
  - type: cheEditor
    reference: 'https://raw.githubusercontent.com/che-samples/che-theia-branding-example/master/che-editor.Meta.yaml'
commands:
  - name: run
    actions:
      - workdir: '${CHE_PROJECTS_ROOT}/python-hello-world'
        type: exec
        command: '. ${CHE_PROJECTS_ROOT}/.venv/bin/activate &&  python hello-world.py'
        component: python
  - name: set up venv
    actions:
      - workdir: '${CHE_PROJECTS_ROOT}/'
        type: exec
        command: python -m venv /projects/.venv
        component: python

，我收到此错误：

我想念什么？