CKEditor 질문입니다... 제발 도와주세요 ㅠㅠ

import React, { useState } from "react";
import { useSelector, useDispatch } from "react-redux";
import {
  Form,
  FormGroup,
  Label,
  Input,
  Button,
  Col,
  Progress,
} from "reactstrap";
import CKEditor from "@ckeditor/ckeditor5-react";
// import ClassicEditor from "@ckeditor/ckeditor5-editor-classic/src/classiceditor";
// import { editorConfiguration } from "../../components/editor/EditorConfig";
// import Myinit from "../../components/editor/UploadAdapter";

const PostWrite = () => {
    const {isAuthenticated} = useSelector( (state) => state.auth )
    const {form, setValue} = useState({ title: "", contents: "", fileUrl: ""})
    const dispatch = useDispatch()

    const onChange = (e) => {
        setValue({
            ...form,
            [e.target.name] : e.target.value
        })
    }

    const getDataFromCKEditor = (event, editor) => {
        console.log('editor')
    }

    const onSubmit = async(e) => {
        await e.preventDefault()
        const { title, contents, fileUrl, category } = form
    }

    return (
        <>
          {isAuthenticated ? (
            <Form onSubmit={onSubmit}>
              <FormGroup className="mb-3">
                <Label for="title">Title</Label>
                <Input
                  type="text"
                  name="title"
                  id="title"
                  className="form-control"
                  onChange={onChange}
                />
              </FormGroup>
              <FormGroup className="mb-3">
                <Label for="category">Category</Label>
                <Input
                  type="text"
                  name="category"
                  id="category"
                  className="form-control"
                  onChange={onChange}
                />
              </FormGroup>
              <FormGroup className="mb-3">
                <Label for="content">Content</Label>
                <CKEditor
                  // editor={ClassicEditor}
                  // config={editorConfiguration}
                  // onInit={Myinit}
                  // onBlur={getDataFromCKEditor}
                />
                <Button
                  color="success"
                  block
                  className="mt-3 col-md-2 offset-md-10 mb-3"
                >
                  제출하기
                </Button>
              </FormGroup>
            </Form>
          ) : (
            <Col width={50} className="p-5 m-5">
              <Progress animated color="info" value={100} />
            </Col>
          )}
        </>
    );
}

export default PostWrite

(38강입니다.)

PostWrite.js에서

import CKEditor from "@ckeditor/ckeditor5-react";

코드를 통해 CKEditor불러와야 하는데 하단의 에러가 발생합니다.

Uncaught Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports.

라는 에러가 발생해서 구글에 검색해보니깐

import CKEditor from "@ckeditor/ckeditor5-react";

이 코드에서 import를 못해와서 발생하는거같습니다만...

package.json에서 @ckeditor/ckeditor5-react 정상적으로 설치되었음에도 불구하고

왜 import를 못하는건지 도저히 모르겠습니다...

인프런 커뮤니티 질문&답변