First of all sorry for my poor english, but i have a problem and i hope someone will can help me with it. When I look at my site on localhost or even the build, everything works perfectly, but when the site is deployed I get this error: Cannot read properties of undefined (reading 'map'). I do not understand why. The site is developed with React and Redux.

{questionsAndAnswers.map((q, index) => 
   <div key={q.id} className={"votre-question-card"} onClick={() => history.push(`/question/${q.id}`)}>
        <h3>Votre question {index + 1}</h3>
        <p>{dayjs(q.date).format("DD/MM/YYYY")}</p>

        {q.reponses.map((r, index) =>
            <div key={r.state} className={"votre-question-card-message"}>
                {r.state == 0 &&
                   <p>1 nouveau message</p>
                }
            </div>
        )}
           <button className={"votre-question-card-button"}><img src={discuter}/>Voir la réponse</button>
    </div>
)}

What works locally but not in production is {q.reponses.map((r, index) =>

QuestionsAndAnswers returns an array containing objects an arrays of objects

console.log of questionsAndAnswers :

Array (5)
  0 Object
    content: ""
    date: "2022-02-17 14:41:29"
    dateClosed: "0000-00-00 00:00:00"
    id: "10"
    idUser: "3499"
    listReponses: [] (0)
    reponses: Array (2)
       0 {id: "16", idQuestion: "10", idCareManager: "0", date: "2022-02-18 12:10:50", state: "1", …}
       1 {id: "6", idQuestion: "10", idCareManager: "2", date: "2021-12-01 11:44:10", state: "1", …}

  1 {id: "11", idUser: "3499", date: "2022-02-21 10:54:06", dateClosed: "0000-00-00 00:00:00", state: "0", …}
  2 {id: "12", idUser: "3499", date: "2022-02-23 16:07:37", dateClosed: "0000-00-00 00:00:00", state: "0", …}
  3 {id: "13", idUser: "3499", date: "2022-02-23 16:44:48", dateClosed: "0000-00-00 00:00:00", state: "0", …}

Thank you for your precious help !