AutoML自然语言节点.jsAPI调用出现“bad base64 decode”错误

{错误:14不可用:从插件获取元数据失败,错误为:错误:0906D064:PEM公司例行程序:PEM\ U read\ U bio:错误的base64解码 在Object.exports.createStatusError错误(/home/ubuntu/workspace/functions/node\u modules/grpc/src)/普通。js:87:15) 在Object.onReceiveStatus(/home/ubuntu/workspace/functions/node\u modules/grpc/src/client)_截击机.js:1188:28) 在截取监听器时。\ callNext(/home/ubuntu/workspace/functions/node\u modules/grpc/src/client)_截击机.js:564:42) 在回调(/home/ubuntu/workspace/functions/node\u modules/grpc/src/client)_截击机.js:841:24) 元数据:元数据{内部报告:{}}, details:'从插件获取元数据失败,错误为:错误:0906D064:PEM公司例行程序:PEM\ U read\ U bio:错误的base64解码'}

产生此错误的代码是:

const automl = require('@google-cloud/automl')
const client = new automl.v1beta1.PredictionServiceClient({keyFilename: 'key_file.json'})
const formattedName = client.modelPath('<project-id>', 'us-central1', '<model-id>')
const payload = {
    textSnippet: {
        content: 'Recognize this text',
        mimeType: 'text/plain'
    }
}
const request = {
  name: formattedName,
  payload,
}
client.predict(request)
  .then(responses => console.log(responses[0].payload[0]))
  .catch(console.error(err))

如果我改变 , ,和 钥匙-文件.json