问TypeError:无法用ajax方法读取未定义的属性(读取'forEach')

EN

<div class="quiz-box"></div>



...



    const url = window.location.href

    const quizBox = document.getElementById('quiz-box')

    let data

    $.ajax({
        type: 'GET',
        url: `${url}data/`,
        success: function(response){
            // console.log(response)
            data = response.data
            data.forEach(el => {
                for (const [question, answers] of Object.entries(el)){
                    quizBox.innerHTML = `
                        <b>${question}</b>
                    `
                }
            });
        },
        error: function(error){
            console.log(error)
        },
    })