错误类型错误：无法读取属性＆＃39;版本＆＃39;空角4

Question

我在具有以下依赖性的角度4应用程序中使用ng2-nouislider。我成功地能够使用和不使用--aot构建并且没有错误但是在浏览器上我收到错误＆＃34;错误类型错误：无法读取属性＆＃39;版本＆＃39; of null＆＃34;在一个无限循环中所以任何人都可以建议这个问题可能是什么原因，因为我在github上经历了不同的解决方案，但似乎没有什么对我有用。

"dependencies": {
    "@angular/animations": "^4.2.6",
    "@angular/common": "^4.0.0",
    "@angular/compiler": "^4.0.0",
    "@angular/core": "^4.0.0",
    "@angular/forms": "^4.0.0",
    "@angular/http": "^4.0.0",
    "@angular/platform-browser": "^4.0.0",
    "@angular/platform-browser-dynamic": "^4.0.0",
    "@angular/router": "^4.0.0",
    "@ngx-translate/core": "6.0.1",
    "@ngx-translate/http-loader": "0.0.3",
    "angular-in-memory-web-api": "~0.3.0",
    "angular2-cookie": "^1.2.6",
    "core-js": "^2.4.1",
    "enhanced-resolve": "^3.3.0",
    "file-saver": "^1.3.3",
    "jquery": "^3.2.1",
    "ng-click-outside": "^2.3.4",
    "ng2-lazy-trumbowyg": "^2.3.1",
    "ng2-nouislider": "1.6.2",
    "ng2-select2": "^1.0.0-beta.10",
    "ngx-cookie": "^1.0.0",
    "ngx-smart-modal": "^2.0.3",
    "nouislider": "^10.1.0",
    "rxjs": "^5.1.0",
    "select2": "^4.0.3",
    "systemjs": "0.19.40",
    "zone.js": "^0.8.4"
  }

错误：

Answer 1

我不确定，但可能在CoverLetterEditorComponent中你正在使用这个变量而它尚未初始化。向我们展示该组件的代码。