HarmonyOS 鸿蒙Next使用 textToSpeech 创建一个文本转语音时出现创建失败

HarmonyOS 鸿蒙Next使用 textToSpeech 创建一个文本转语音时出现创建失败

我是在HarmonyOS NEXT 下开发，使用的是HarmonyOS NEXT模拟器
使用如下的方法：

 private create(){
    // 设置创建引擎参数
    let extraParam: Record<string, Object> = {"style": 'interaction-broadcast', "locate": 'CN', "name": 'EngineName'};
    let initParamsInfo: textToSpeech.CreateEngineParams = {
      language: 'zh-CN',
      person: 0,
      online: 1,
      extraParams: extraParam
    };
    try {
      // 调用createEngine方法
      textToSpeech.createEngine(initParamsInfo, (err: BusinessError, textToSpeechEngine: textToSpeech.TextToSpeechEngine) => {
        if (!err) {
          console.log("MyTextToSpeechUtils createEngine is succeeded")
          // Logger.debug("MyTextToSpeechUtils createEngine is succeeded")
          // 接收创建引擎的实例
          this.ttsEngine = textToSpeechEngine;

          this.listener();

        } else {
          console.log("MyTextToSpeechUtils errCode is "+err.code+" errMessage is "+err.message)
          // 创建引擎失败时返回错误码1003400005，可能原因：引擎不存在、资源不存在、创建引擎超时
          // Logger.error("MyTextToSpeechUtils errCode is "+err.code+" errMessage is "+err.message)
        }
      });
    } catch (error) {
      let message = (error as BusinessError).message;
      let code = (error as BusinessError).code;
      console.error(`MyTextToSpeechUtils createEngine failed, error code: ${code}, message: ${message}.`)
      // Logger.error(`MyTextToSpeechUtils createEngine failed, error code: ${code}, message: ${message}.`)
    }
  }

在创建过程中抛异常为：createEngine failed, error code: undefined, message: Cannot read property createEngine of undefined.