在DJI Windows SDK中初始化和执行WayPoint Mission的步骤有哪些？

我正在使用以下代码尝试初始化Waypoint任务并将其加载到飞机（DJI Mavic Air）上。

我首先检查航路点处理程序的状态，然后初始化一个航路点，将其添加到列表中，然后将该列表包括在已初始化的航路点任务中。然后运行将航点任务加载到飞机的方法，然后检查状态。调试的输出如下所示：

航点状态= READY_TO_UPLOAD;

新航点位置-55.555549621582,0.555555522441864

加载任务返回值-INVALID_REQUEST_IN_CURRENT_STATE

航点状态= READY_TO_UPLOAD

READY_TO_UPLOAD的状态表明，根据Windows SDK文档上载路点任务处于适当的状态，但是显然上载失败并且状态保持不变。

为了使航点任务成功加载，需要进行哪些更改才能由飞机运行？

//Check the initial state of the waypoint handler
var currentState = DJISDKManager.Instance.WaypointMissionManager.GetWaypointMissionHandler(0).GetCurrentState();
Debug.WriteLine("Waypoint state = {0}", currentState);

//Initialise new location coordinate
randomLocation.X = 55.55555;
randomLocation.Y = 0.55555555;
Debug.WriteLine("New waypoint location - {0},{1}", randomLocation.X, randomLocation.Y);
LocationCoordinate2D waypointLocation = new LocationCoordinate2D { latitude = randomLocation.X, longitude = randomLocation.Y };

// Create a waypoint instance and add to waypoint list
Waypoint waypoint = new Waypoint { location = waypointLocation };
waypointList.Add(waypoint);

//Create new waypoint mission instance and load in the waypoint list
WaypointMission waypointMission = new WaypointMission
        {
            waypointCount = 1,
            autoFlightSpeed = 2.5,
            finishedAction = WaypointMissionFinishedAction.NO_ACTION,
            headingMode = WaypointMissionHeadingMode.USING_WAYPOINT_HEADING,
            flightPathMode = WaypointMissionFlightPathMode.CURVED,
            repeatTimes = 0,
            waypoints = waypointList,
            missionID = 1
        };

//load the waypoint mission to the aircraft and check the current state
var load_retval = DJISDKManager.Instance.WaypointMissionManager.GetWaypointMissionHandler(0).LoadMission(waypointMission); ;
Debug.WriteLine("Load mission return value - {0}", load_retval);

currentState = DJISDKManager.Instance.WaypointMissionManager.GetWaypointMissionHandler(0).GetCurrentState();
Debug.WriteLine("Waypoint state = {0}", currentState);