高德地图PathSimplifier setData?

Question

大佬们好，请问我使用高德的PathSimplifier 轨迹展示功能，我创建实例之后，在websocket里面定时往实例里面set数据，当我set的时候报错了一个(reding "Md"), 想请问一下各位这个Md是指什么意思呢？
下面是我的代码

          this.pathSimplifierIns.setData(this.demopath);
                    let number = this.demopath.length - 1;
                    lazyAMapApiLoaderInstance.load().then(() => {
                      AMapUI.load(
                        ["ui/misc/PathSimplifier"], (PathSimplifier) => {
                          const pathNavigator =  this.pathSimplifierIns.createPathNavigator(number, {
                              loop: false, // 是否循环
                              pathNavigatorStyle: {
                                width: 16,
                                height: 32,
                                //  content: pathNavigator.Render.Canvas.getImageContent(require('../assets/iveco0573.png'), onload, onerror), // 替换巡航器图片
                                content:
                                  PathSimplifier.Render.Canvas.getImageContent(
                                    require("../assets/iveco0575.png"),
                                    onload,
                                    onerror
                                  ),
                              },
                              speed: 999999999, // 速度(km/h)
                            });
                          console.log('pathNavigatorstart');
                          pathNavigator.start();
                        }
                      );
                    });