无法在Chromecast接收器应用中加载隐藏式字幕

如何解决无法在Chromecast接收器应用中加载隐藏式字幕

我正在尝试在Chromecast中加载隐藏式字幕，

    playerManager.addEventListener(cast.framework.events.EventType.PLAYER_LOAD_COMPLETE,() => {
        const textTracksManager = playerManager.getTextTracksManager();
        for (var i = 0; i < closedCaptionTracks.length; i++) {
            const track = textTracksManager.createTrack();
            var closedCaption = closedCaptionTracks[i];
            track.trackContentType = closedCaption.trackContentType;
            track.trackContentId = closedCaption.trackContentId;
            track.language = closedCaption.language;
            textTracksManager.addTracks([track]);
            console.log(`[${debugTag}] ClosedCaption Track :`,track);
            break;
        }
        textTracksManager.setActiveByLanguage('en');
    });

但它没有加载任何隐藏式字幕，并在控制台上引发了此错误。

 [ 12.566s] [cast.framework.media.TracksManager] Cannot change tracks in disposed state 

我正在使用以下回调来获取流和隐藏字幕信息。

playerManager.setMediaUrlResolver((loadRequestData) => {
    // fetch stream and subtitles &
    // populates closedCaptionTracks array
}