我試圖了解 Spotify API。這個小代碼控制臺記錄了用戶正在收聽的歌曲的當前節拍信息。它工作正常，但在運行幾秒鐘后，它會記錄一個錯誤，在該錯誤之后，它開始一遍又一遍地記錄同一節拍的信息。有任何想法嗎？這是我的代碼，提前謝謝你！var spotifyApi, spotifyToken;var current, currentId, timeProgress, beatStart, beatsTotal;var dataArray = [];var beatsArray = [];var spotifyToken = 'token';spotifyApi = new SpotifyWebApi();spotifyApi.setAccessToken( spotifyToken );init();function init(){  onReceiveCurrent();}function onReceiveCurrent ( err, data ) {  if (err) {    console.error(err);    return;  }  spotifyApi.getMyCurrentPlaybackState({}, onReceiveCurrent );  currentId = data.item.id;  timeProgress = data.progress_ms;  spotifyApi.getAudioAnalysisForTrack(currentId, onReceiveAnalysisCallback);}function onReceiveAnalysisCallback ( err, data ) {  if (err) {    console.error(err);    return;  }  for (var i=0; i<data.beats.length; i++) {    beatsArray[i] = data.beats[i].start;  }  var found = beatsArray.find(function (element) {        return element >= timeProgress/1000;  });  var a = beatsArray.indexOf(found);  beatStart = data.beats[a];  console.log(beatStart);}這是錯誤：