Plugins 错误：某些CKEditor 5模块重复

我在一个angular项目中工作，在我的项目中使用插件，出现以下错误： 错误：某些CKEditor 5模块重复。我导入了@ckeditor/ckeditor5校准的包

.html文件-

<ckeditor #editor [editor]="editor" [config]="config"></ckeditor>

---

我使用了ckeditor5 editor classic而不是ckeditor5 build classic，并出现另一个错误：无法读取null的属性“getAttribute”。 .html文件

.ts文件

    import * as ClassicEditor from '@ckeditor/ckeditor5-build-classic';
    import Alignment from '@ckeditor/ckeditor5-alignment/src/alignment';
     export class WelcomePageSettingComponent implements OnInit {  
      public editor = ClassicEditor;  
      public config = {
        plugins: [Alignment],
        toolbar: ['heading', '|', 'bold', 'italic', '|', 'alignment']   };   constructor() { 
       }
       constructor() { }
       ngOnInit() {  }
     }

import Alignment from '@ckeditor/ckeditor5-alignment/src/alignment';
 import ClassicEditor from "@ckeditor/ckeditor5-editor-classic/src/classiceditor";
 export class WelcomePageSettingComponent implements OnInit {
   public editor = ClassicEditor;
   constructor() { }
   ngOnInit() {
     ClassicEditor
     .create(document.querySelector('#editor'), {
        plugins: [Alignment],
        toolbar: ['heading', '|', 'bold', '|', 'italic', '|', 'mediaEmbed', '|',  
        'alignment']
      })
      .then()
      .catch();
  }
}