Backstage Publish Repo Azure Devops Server

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We are using Azure DevOps Server 2020 (On-Prem). We want to create repositories from backstage scaffolder template. We integrated our repository on app-config.yaml file and succesfully added component for kind: Template. Now we want to use this template to create and publish this repo to Azure. But, we couldn't manage it we are having "Cannot read properties of null (reading 'value')" error on Publish stage

Here is my "template.yaml" file;

apiVersion: scaffolder.backstage.io/v1beta3 kind: Template metadata: name: v1beta3-demo title: Test Action template description: scaffolder v1beta3 template demo spec: owner: backstage/techdocs-core type: service

input parameters: - title: Fill in some steps required: - name properties: name: title: Name type: string description: Unique name of the component ui:autofocus: true ui:options: rows: 5 - title: Choose a location required: - repoUrl properties: repoUrl: title: Repository Location type: string ui:field: RepoUrlPicker ui:options: allowedHosts: - tfsmaster.tech.com.tr

steps: - id: fetch-base name: Fetch Base action: fetch:template input: url: ./skeleton values: name: ${{ parameters.name }}

- id: publish
  name: Publish
  action: publish:azure
  input:
    allowedHosts: ['tfsmaster.tech.com.tr']
    description: This is ${{ parameters.name }}
    repoUrl: ${{ parameters.repoUrl }}

- id: register
  name: Register
  action: catalog:register
  input:
    repoContentsUrl: ${{ steps['publish'].output.repoContentsUrl }}
    catalogInfoPath: '/catalog-info.yaml'

Here is the full error; are we missing something?

2023-12-25T12:20:14.000Z Beginning step Publish22023-12-25T12:20:15.000Z TypeError: Cannot read properties of null (reading 'value')3 at /app/node_modules/azure-devops-node-api/VsoClient.js:124:524 at processTicksAndRejections (node:internal/process/task_queues:96:5)

I tried to create a repository from template. It was not created.

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