로그아웃 부분 에러

로그아웃에서 다음과 같은 에러가 발생합니다.

강의 몇 번째 되돌려봤는데 틀린 부분은 없어보이는데 어디가 문제인거죠?

import React, { useCallback } from 'react';
import {Avatar, Card, Button} from 'antd';
import {useDispatch} from "react-redux";
import logoutAction from '../reducers'

const UserProfile = () => {
    const dispatch = useDispatch();
    const onLogOut = useCallback(() => {
        dispatch(logoutAction());
    }, []);

    return (
        <Card
            actions={[
                <div key="twit">내용<br/>0</div>,
                <div key="followings">팔로잉<br/>0</div>,
                <div key="followers">팔로워<br/>0</div>,
            ]}
        >
            <Card.Meta
                avatar={<Avatar>YK</Avatar>}
                title="TEST"
            />
            <Button onClick={onLogOut}>로그아웃</Button>
        </Card>
    );
};

export default UserProfile;

import {HYDRATE} from "next-redux-wrapper";

const initialState = {
    user: {
        isLoggedIn: false,
        user: null,
        signupData: {},
        loginData: {},
    },
    post: {
        mainPosts: [],
    }
};

export const loginAction = (data) => {
    return {
        type: 'LOG_IN',
        data,
    }
}

export const logoutAction = () => {
    return {
        type: 'LOG_OUT',
    }
}

const rootReducer = (state = initialState, action) => {
    switch (action.type) {
        case HYDRATE:
            console.log('HYDRATE', action);
            return {...state, ...action.payload};
        case 'LOG_IN' :
            return {
                ...state,
                user: {
                    ...state.user,
                    isLoggedIn: true,
                    user: action.data,
                },
            };
        case 'LOG_OUT' :
            return {
                ...state,
                user: {
                    ...state.user,
                    isLoggedIn: false,
                    user: null,
                },
            };
        default:
            return state;
    }
};

export default rootReducer;

빠른 답변 부탁드립니다..