HarmonyOS backgroundTaskManager 9800005 Error

setBackgroundTask() {
  // 后台任务
  let wantAgentInfo: wantAgent.WantAgentInfo = {
    // 点击通知后，将要执行的动作列表
    wants: [
      {
        bundleName: "xxxx",
        abilityName: "EntryAbility"
      }
    ],
    // 点击通知后，动作类型
    actionType: wantAgent.OperationType.START_ABILITY,
    // 使用者自定义的一个私有值
    requestCode: 0,
    // 点击通知后，动作执行属性
    wantAgentFlags: [wantAgent.WantAgentFlags.UPDATE_PRESENT_FLAG]
  };

  try {
    // 通过wantAgent模块下getWantAgent方法获取WantAgent对象
    wantAgent.getWantAgent(wantAgentInfo).then((wantAgentObj: WantAgent) => {
      try {
        backgroundTaskManager.startBackgroundRunning(this.context,
          backgroundTaskManager.BackgroundMode.LOCATION, wantAgentObj, callback)
      } catch (error) {
        console.error(`Operation startBackgroundRunning failed. code is ${(error as BusinessError).code} message is ${(error as BusinessError).message}`);
      }
    });
  } catch (error) {
    console.error(`Operation getWantAgent failed. code is ${(error as BusinessError).code} message is ${(error as BusinessError).message}`);
  }
}

运行后

07-29 13:08:35.060   6764-6764    A03D00/JSAPP  com.xxxx  E     Operation startBackgroundRunning failed. code is 9800005 message is BussinessError 9800005: Continuous Task verification failed. The bgMode is invalid.