当尝试使用amcharts重新生成有向图时，我得到错误：“未找到导出‘默认’(导入为'am4plugins_forceDirected')

<script src="https://cdn.amcharts.com/lib/4/core.js"></script>
<script src="https://cdn.amcharts.com/lib/4/charts.js"></script>
<script src="https://cdn.amcharts.com/lib/4/plugins/forceDirected.js"></script>

// 导入amcharts核心模块和有向图插件
import * as am4core from "@amcharts/amcharts4/core";
import * as am4plugins_forceDirected from "@amcharts/amcharts4/plugins/forceDirected";

// 使用有向图插件
am4core.useTheme(am4themes_animated);
am4core.useTheme(am4themes_dark);
am4core.useTheme(am4themes_kelly);

// 创建有向图实例
var chart = am4core.create("chartdiv", am4plugins_forceDirected.ForceDirectedTree);