섹션28 오류 질문

검색 해보니까 input태그에 자식을 넣어서 발생하는 에러라고 하는데 코드에는
input태그에 props를 넣은것 빼곤 그럴만한 에러사항이 없습니다. 무엇이 문제인가요..?ㅠ

index.js

import BoardWrite from "../../../src/components/units/board/write/BoardWrite.container";

export default function GraphqlMutationPage() {
  // 한 줄일 땐 괄호() 필요 없음
  return (
    <div>
      <div>########## 여기는 페이지입니다.####### </div>
      <BoardWrite />;<div>########## 여기는 페이지입니다.####### </div>
    </div>
  );
}

BroadWrite.container.js:

import { useMutation } from "@apollo/client";
import { useState } from "react";
import BoardWriteUI from "./BoardWrite.presenter";
import { 나의그래프큐엘셋팅 } from "./BoardWrite.queries";

export default function BoardWrite(props) {
  const [writer, setWriter] = useState();
  const [title, setTitle] = useState();
  const [contents, setContents] = useState();

  const [나의함수] = useMutation(나의그래프큐엘셋팅);

  const onClickSubmit = async () => {
    const result = await 나의함수({
      variables: {
        // variables 이게 $ 역할을 함
        writer: writer,
        title: title,
        contents: contents,
      },
    });
    console.log(result);
  };

  const onChangeWriter = (event) => {
    setWriter(event.target.value);
  };

  const onChangeTitle = (event) => {
    setTitle(event.target.value);
  };

  const onChangeContents = (event) => {
    setContents(event.target.value);
  };

  return (
    <div>
      <div>$$$$$$$$$여기는 컨테이너입니다.$$$$$$$$</div>
      <BoardWriteUI
        aaa={onClickSubmit}
        bbb={onChangeWriter}
        ccc={onChangeTitle}
        ddd={onChangeContents}
      />
      <div>$$$$$$$$$여기는 컨테이너입니다.$$$$$$$$</div>
    </div>
  );
}

BroadWrite.presenter.js

import { RedInput, BlueButton } from "./BoardWrite.styles";

export default function BoardWriteUI(props) {
  return (
    <div>
      <div>@@@@@@@@@@@여기는 프리젠터입니다.@@@@@@@@@@</div>
      <div>
        작성자: <RedInput type="text" onChange={props.bbb} />
        제목: <input type="text" onChange={props.ccc} />
        내용: <input type="text" onChange={props.ddd} />
        <BlueButton onClick={props.aaa}>GRAPHQL-API 요청하기</BlueButton>;
      </div>
      <div>@@@@@@@@@@@여기는 프리젠터입니다.@@@@@@@@@@</div>
    </div>
  );
}

BroadWrite.styles.js

import styled from "@emotion/styled";

export const RedInput = styled.input`
  border-color: red;
`;

export const BlueButton = styled.input`
  background-color: blue;
`;