SoundCloud SC.oEmbed返回带有404的html iframe

Question

我正在尝试使用他们的Javascript API从soundcloud流式播放曲目，但在询问流式网址时我一直收到404：

 SC.oEmbed(track_url, { auto_play: false }).then(function(oEmbed) {
      var iframeContainer = document.getElementById('soundcloud-preview-iframe-<?php echo $track->id; ?>')
      iframeContainer.innerHTML = oEmbed.html;
      var iframe = iframeContainer.getElementsByTagName("iframe")[0];
      widget<?php echo $track->id; ?> = SC.Widget(iframe);
      widget<?php echo $track->id; ?>.bind(SC.Widget.Events.READY, function() {
        jQuery(".soundcloud-preview-control-<?php echo $track->id; ?>").addClass("soundcloud-preview-control-play").html('<!-- -->');
      });
      widget<?php echo $track->id; ?>.bind(SC.Widget.Events.PLAY_PROGRESS, function() {
        widget<?php echo $track->id; ?>.getPosition(function(positionSC) {
          if( (secondsLimit*1000)<Math.floor(positionSC) ) {
            widget<?php echo $track->id; ?>.pause();
            curSongId = '';
            jQuery(".soundcloud-preview-control-<?php echo $track->id; ?>").removeClass("soundcloud-preview-control-stop").addClass("soundcloud-preview-control-play");
          }
        });
      });
    });

我在oEmbed.html json对象的此调用中收到与控制台相关的多个404错误： https://soundcloud.com/oembed.json?auto_play=false&url=xxx

我想知道为什么使用他们的JS API不起作用。