“WebPushError：收到意外的响应代码”状态代码：403

如何解决“WebPushError：收到意外的响应代码”状态代码：403

我正在尝试使用 web-push npm 包发送通知
仍然出现错误
我正在使用：
"body-parser": "1.19.0",
"express": "4.17.1",
"web-push": "3.4.4"

节点版本：v14.15.1

错误::

 WebPushError: Received unexpected response code
    at IncomingMessage.<anonymous> (E:\mine\Notify Me\node_modules\web-push\src\web-push-lib.js:347:20)
    at IncomingMessage.emit (events.js:327:22)
    at endReadableNT (_stream_readable.js:1327:12)
    at processticksAndRejections (internal/process/task_queues.js:80:21) {
  statusCode: 403,headers: {
    'content-type': 'text/plain; charset=utf-8','x-content-type-options': 'nosniff','x-frame-options': 'SAMEORIGIN','x-xss-protection': '0',date: 'Sun,07 Feb 2021 07:36:07 GMT','content-length': '70','alt-svc': 'h3-29=":443"; ma=2592000,h3-T051=":443"; ma=2592000,h3-Q050=":443"; ma=2592000,h3-Q046=":443"; ma=2592000,h3-Q043=":443"; ma=2592000,quic=":443"; ma=2592000; v="46,43"',connection: 'close'
  },body: 'exp claim MUST NOT be more than 24 hours from the time of the request\n',endpoint: 'https://fcm.googleapis.com/fcm/send/cYXXoxqEhl0:APA91bFysSNp-eRBDqIqqbDQBI8-tJkZwwFPIvqi79JJJ0m_z0sYlhIoQpUQjqIfDF0juxQ5M7HabAD5i3y99nDURKhQhY54iObhuWsBW11y1BX_sbAYDLVETcvGHOzdzgxxtF3pfsvM'
}

我在服务器中的代码

app.post('/subscribe',(req,res)=>{
   console.log('working');
   const subscription = req.body;
   console.dir(subscription);
    const opts = {
       vapidDetails : {
          subject: 'http://localhost:5000',publicKey: publicKey,privateKey: privateKey
       }
    }
    const payload = JSON.stringify({ title: "Push Test",body : "hello world" });
    res.status(201).json({});
    webpush
      .sendNotification(subscription,payload,opts)
      .catch(err => console.error(err));
})

在客户端 main.js 文件中

navigator.serviceWorker.getRegistration().then( reg =>{
   reg.pushManager.subscribe({
      userVisibleOnly : true,applicationServerKey : urlBase64ToUint8Array(publicvapidKey)
   }).then( sub => {
      console.dir(sub);
      fetch('/subscribe',{
         method : "POST",body : JSON.stringify(sub),headers: {
            "Content-Type" : "application/json"
         }
      })
   }).catch(err => {
      console.error(err);
   })
})

在 sw.js (service worker) 文件中

self.addEventListener('push',event =>{
   const data=event.data.json();
   event.waitUntil(
      self.registration.showNotification(data)
   );
})