Angular 角度：类型错误：无法读取属性'；拆封'；未定义的。添加bufferutil'；行不通

在我的Spring Angular项目中，我面临以下问题：

if (mask != null && buf != null) bufferUtil.unmask(buf, mask);
                                                  ^
    TypeError: Cannot read property 'unmask' of undefined
        at Receiver.unmask (D:\build\node_modules\browser-sync\node_modules\ws\lib\Receiver.js:306:47)
        at Receiver.finish (D:\build\node_modules\browser-sync\node_modules\ws\lib\Receiver.js:505:25)
        at Receiver.expectHandler (D:\build\node_modules\browser-sync\node_modules\ws\lib\Receiver.js:493:33)
        at Receiver.add (D:\build\node_modules\browser-sync\node_modules\ws\lib\Receiver.js:103:24)
        at Socket.realHandler (D:\build\node_modules\browser-sync\node_modules\ws\lib\WebSocket.js:825:20)
        at Socket.emit (events.js:321:20)
        at addChunk (_stream_readable.js:297:12)
        at readableAddChunk (_stream_readable.js:273:9)
        at Socket.Readable.push (_stream_readable.js:214:10)
        at TCP.onStreamRead (internal/stream_base_commons.js:186:23)
    error Command failed with exit code 1.
    info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
    error Command failed with exit code 1.
    info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
    error Command failed with exit code 1.
    info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

我在网上读到，添加bufferutil依赖项应该会有所帮助，但在我的例子中没有。下面是我在package.json中的依赖项列表

我还尝试升级一些依赖项，但这个错误不会消失。请注意，应用程序仍在浏览器中启动，并且似乎正在运行。你有什么想法吗？谢谢

你看到这个链接了吗？似乎

bufferutil@2

仅与

ws@>=2.0.2

兼容。

"dependencies": {
    "@angular/animations": "^5.0.0",
    "@angular/cdk": "^5.2.0",
    "@angular/common": "5.2.0",
    "@angular/compiler": "5.2.0",
    "@angular/core": "5.2.0",
    "@angular/forms": "5.2.0",
    "@angular/http": "^5.0.0",
    "@angular/material": "^5.2.0",
    "@angular/material-moment-adapter": "^6.4.7",
    "@angular/platform-browser": "5.2.0",
    "@angular/platform-browser-dynamic": "5.2.0",
    "@angular/router": "5.2.0",
    "@mdi/font": "^2.8.94",
    "@ng-bootstrap/ng-bootstrap": "1.0.0",
    "@stomp/ng2-stompjs": "^4.0.1",
    "bootstrap": "4.4.0",
    "bufferutil": "4.0.1",
    "chart.js": "^2.7.2",
    "chartjs-plugin-annotation": "^0.5.7",
    "chartjs-plugin-datalabels": "^0.4.0",
    "core-js": "2.4.1",
    "file-saver": "^1.3.8",
    "font-awesome": "4.7.0",
    "hammerjs": "^2.0.8",
    "jquery": "3.3.0",
    "moment": "^2.22.2",
    "ng-jhipster": "0.5.0",
    "ng2-charts": "^1.6.0",
    "ngc-float-button": "^1.2.1",
    "ngx-cookie": "2.0.1",
    "ngx-infinite-scroll": "0.9.0",
    "ngx-webstorage": "^2.0.1",
    "node-sass": "^4.13.1",
    "reflect-metadata": "0.1.13",
    "rxjs": "5.5.12",
    "sass": "^1.25.0",
    "socket.io": "2.3.0",
    "sockjs-client": "1.5.0",
    "stompjs": "^2.3.3",
    "swagger-ui": "2.2.10",
    "tether": "1.4.7",
    "ws": "^7.3.1",
    "zone.js": "0.11.1"
  },