当我尝试在index.js上部署如下的functions.pubsub.schedule时：
const functions = firebase.functions;
var cronCount = 0;
exports.processPostsCron = functions.pubsub.schedule('* * * *
*').onRun(context => {
cronCount++;
console.log(`### this runs every minute. count: ${cronCount}`);
});
发生了错误：
函数：无法创建函数processPostsCron HTTP错误：400，请求有错误
如何解决此错误，或者我做错了吗？我指的是这个https://github.com/firebase/functions-samples/blob/master/delete-unused-accounts-cron/functions/index.js
我正在使用firebase-admin@7.0.0和firebase-functions@2.3.1。
调试结果：
i functions: creating Node.js 8 function processPostsCron(us-central1)...
[2019-05-29T17:19:41.712Z] Trigger is: {"eventTrigger":{"resource":"projects/ticktock-d34b6/topics","eventType":"google.pubsub.topic.publish","service":"pubsub.googleapis.com"}}
[2019-05-29T17:19:41.714Z] >>> HTTP REQUEST POST https://cloudfunctions.googleapis.com/v1/projects/ticktock-d34b6/locations/us-central1/functions
sourceUploadUrl=https://storage.googleapis.com/gcf-upload-us-central1-f74bb5e4-12fb-4381-9f5a-ba9e11a921a8/2fac50ef-9d15-4390-8836-21209adfa8b4.zip?GoogleAccessId=service-1096541131355@gcf-admin-robot.iam.gserviceaccount.com&Expires=1559152179&Signature=EzcN7sYYs05vuTyVu7%2BMyJGU8viklA5VWPZRmMeASBCmlK6Xl%2BtMhL1G%2Fv4JHempDcLJ3FmvLDGPbar1iP%2BtNiApL%2B%2Fn6wjQINbF4CmpmqKnjxieBqpzkRYUD40zNMyCGbRDnkhcsps6DBpI9reiHvxdKkqYqadBPCaCn10nZwo96zaHcxZYHWg5PIo4cPLoPyOI7PTl4WYdwwt%2FzOHKlQSdyh1VuRgZqwfgy0vgDQR9HY846k0Tkg6RB6fGex8MzysUxiZ4RfPdt1i0LGd1KpY%2ByhG0OlEsMODQY3bBQ4TMh6LNbVyC2s9%2F0wJPkzAdJpnTjarf3hOgsF9908VkOg%3D%3D, name=projects/ticktock-d34b6/locations/us-central1/functions/processPostsCron, entryPoint=processPostsCron, deployment-tool=cli-firebase, deployment-scheduled=true, runtime=nodejs8, resource=projects/ticktock-d34b6/topics, eventType=google.pubsub.topic.publish, service=pubsub.googleapis.com
[2019-05-29T17:19:42.141Z] <<< HTTP RESPONSE 400 vary=X-Origin, Referer, Origin,Accept-Encoding, content-type=application/json; charset=UTF-8, date=Wed, 29 May 2019 17:19:42 …