Failed to create collection with vectorizers using demo code in nodejs

Environment: free cloud sandbox instance on Weaviate Cloud (WCD)
Code language: nodejs (v18.20.4)
Version: weaviate-client (v3.1.5)
Code:

const client = await weaviate.connectToWeaviateCloud(
  clusterUrl,
  {
    authCredentials: new weaviate.ApiKey(apiKeyAdmin),
    headers: {
      'X-OpenAI-Api-Key': openaiApiKey
    }
  }
)

await client.collections.create({
    name: testCollectionName,
    vectorizers: [
      weaviate.configure.vectorizer.text2VecOpenAI({
        name: 'question_vector',
        sourceProperties: ['question'],
        model: 'text-embedding-3-large',
        dimensions: 1024
      })
    ],
    properties: [
      { name: 'category', dataType: dataType.TEXT },
      { name: 'question', dataType: dataType.TEXT },
      { name: 'answer', dataType: dataType.TEXT },
    ]
})

It’s demo code from the document. But it can not create collection with vectorizer. (The result is : collection is created, but the Vectorizer is empty when view in console page)

Plus: The openaiApiKey provided is corrent.

I don’t know what’s wrong. Need help here. Thanks.