No pude rastrear el problema, podría ser algo con la función asíncrona o el enlace useEffect. Si elimino el comentario del siguiente código, obtengo estos errores.
Quizzical.js
import React from 'react' export default function Quizzical() { const [quizzState, setQuizzState] = React.useState([]) async function getQuestions() { let response = await fetch("https://opentdb.com/api.php?amount=5") let data = await response.json() return data; } function prepareQuestions(data) { let objectArray = [] data.map(item => { let answersArray = [] item.incorrect_answers.map(ans => answersArray.push(ans)) answersArray.splice(Math.floor(Math.random() * answersArray.length), 0, item.correct_answer) objectArray.push({ answers: answersArray, question: item.question, correct: item.correct_answer, chosen: null }) }) return objectArray } React.useEffect(() => { getQuestions().then(data => setQuizzState(prepareQuestions(data.results))) }, []) function setAnswer(id, answerID) { let obj = quizzState[1] console.log(obj) // setQuizzState(prev => { // return [...prev] // }) } function answerClicked(id, answer) { console.log(id, answer) } setAnswer() return ( <div className="quizzical-app"> </div> ) }