尝试返回mp3文件时Alexa技能错误

Question

我正在尝试让Alexa播放我存储在公共的AWS S3存储桶中的mp3文件。当我尝试触发其他意图时，一切都会正常进行，但是当我使用音频文件触发一个意图时，它将触发错误意图：

Sorry, I can't understand the command. Please say again.

Index.js文件：

const PlayTheThreePiggletsIntentHandler = {
    canHandle(handlerInput) {
        return handlerInput.requestEnvelope.request.type === 'IntentRequest'
            && handlerInput.requestEnvelope.request.intent.name === 'PlayThreePigletsIntent';
    },
    handle(handlerInput) {
        const song = constants.audioData;

        return handlerInput.addAudioPlayerPlayDirective('REPLACE_ALL', song[1].url, '0', 10)
            .withShouldEndSession(true)
            .getResponse();
    }
};

constants.js：

exports.audioData = [
    {
        title: 'Gods plan',
        url: 'https://s3-eu-west-1.amazonaws.com/kinderverhalen-template/tale2.mp3'
    },
    {
        title: 'The Three Piglets',
        url: 'https://s3-eu-west-1.amazonaws.com/kinderverhalen-template/tale.mp3'
    }
];

谢谢！