/vue_src/project/Admin/index.js

/* global BoostrapDialog */
import axios from 'axios'
import qs from 'qs'
// закоментировал, чтобы проверить webpack.ProvidePlugin
//import { ClassicEditor } from '@ckeditor/ckeditor5-build-classic'
//import { default as SimpleUploadAdapter } from '@ckeditor/ckeditor5-upload/src/adapters/simpleuploadadapter'

ClassicEditor.create('#editor');

// остальной код