Angular Material导致未处理的Promise拒绝：无法加载

Question

我正在处理未经处理且实时服务器没有响应问题的角度4.我使用角度材料和应用程序刚刚破坏，因为mdc.select.min.css canout可以在@ material＆gt; select中找到。通过重新启动计算机，以下问题开始时是蓝色的。我可以在所需文件夹中的文件中看到。但仍然得到错误。生成新项目并重新安装所有包但没有运气。

这是错误

Failed to load resource: the server responded with a status of 404 (Not Found)
:4200/node_modules//dist/mdc.select.min.css Failed to load resource: the server responded with a status of 404 (Not Found)

polyfills.bundle.js:3057 Unhandled Promise rejection: Failed to load ../../../../../node_modules//dist/mdc.select.min.css ; Zone: ; Task: Promise.then ; Value: Failed to load ../../../../../node_modules//dist/mdc.select.min.css undefined

api.onUnhandledError @ polyfills.bundle.js:3057
polyfills.bundle.js:3059 Error: Uncaught (in promise): Failed to load ../../../../../node_modules//dist/mdc.select.min.css


at resolvePromise (polyfills.bundle.js:3184)
at resolvePromise (polyfills.bundle.js:3155)
at polyfills.bundle.js:3232
at ZoneDelegate.webpackJsonp.../../../../zone.js/dist/zone.js.ZoneDelegate.invokeTask (polyfills.bundle.js:2838)
at Zone.webpackJsonp.../../../../zone.js/dist/zone.js.Zone.runTask (polyfills.bundle.js:2605)
at drainMicroTaskQueue (polyfills.bundle.js:2998)
at XMLHttpRequest.ZoneTask.invoke (polyfills.bundle.js:2904)
api.onUnhandledError @ polyfills.bundle.js:3059
](url)

角cli.json

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "project": {
    "name": "edrop"
  },
  "apps": [
    {
      "root": "src",
      "outDir": "dist",
      "assets": [
        "assets",
        "favicon.ico"
      ],
      "index": "index.html",
      "main": "main.ts",
      "polyfills": "polyfills.ts",
      "test": "test.ts",
      "tsconfig": "tsconfig.app.json",
      "testTsconfig": "tsconfig.spec.json",
      "prefix": "app",
      "styles": [
       "../node_modules/bootstrap/dist/css/bootstrap.min.css",
        "styles.css"
      ],
      "scripts": [],

      "environmentSource": "environments/environment.ts",
      "environments": {
        "dev": "environments/environment.ts",
        "prod": "environments/environment.prod.ts"
      }
    }
  ],
  "e2e": {
    "protractor": {
      "config": "./protractor.conf.js"
    }
  },
  "lint": [
    {
      "project": "src/tsconfig.app.json"
    },
    {
      "project": "src/tsconfig.spec.json"
    },
    {
      "project": "e2e/tsconfig.e2e.json"
    }
  ],
  "test": {
    "karma": {
      "config": "./karma.conf.js"
    }
  },
  "defaults": {
    "styleExt": "css",
    "component": {}
  }
}