[Bug Report]: Cannot read properties of null (reading 'appendChild')

[condorheroblog]

发生了什么？

我遇到了如图错误。下面是我的全部代码。

import LogicFlow from "@logicflow/core";
import { BpmnElement, BpmnXmlAdapter, Control, DndPanel, Menu, MiniMap, SelectionSelect, Snapshot } from "@logicflow/extension";
import { useEffect, useRef } from "react";
import "@logicflow/core/dist/index.css";
import "@logicflow/extension/lib/style/index.css";

export default function FlowChart() {
	const refContainer = useRef<HTMLDivElement>(null);
	useEffect(() => {
		if (refContainer.current) {
			const lf = new LogicFlow({
				container: refContainer.current,
				stopZoomGraph: true,
				metaKeyMultipleSelected: true,
				grid: true,
				keyboard: {
					enabled: true,
				},
				snapline: true,
				plugins: [
					BpmnElement,
					BpmnXmlAdapter,
					Control,
					Menu,
					SelectionSelect,
					DndPanel,
				],
			});
			lf.setPatternItems([
				{
					label: "选区",
					icon: "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAAH6ji2bAAAABGdBTUEAALGPC/xhBQAAAOVJREFUOBGtVMENwzAIjKP++2026ETdpv10iy7WFbqFyyW6GBywLCv5gI+Dw2Bluj1znuSjhb99Gkn6QILDY2imo60p8nsnc9bEo3+QJ+AKHfMdZHnl78wyTnyHZD53Zzx73MRSgYvnqgCUHj6gwdck7Zsp1VOrz0Uz8NbKunzAW+Gu4fYW28bUYutYlzSa7B84Fh7d1kjLwhcSdYAYrdkMQVpsBr5XgDGuXwQfQr0y9zwLda+DUYXLaGKdd2ZTtvbolaO87pdo24hP7ov16N0zArH1ur3iwJpXxm+v7oAJNR4JEP8DoAuSFEkYH7cAAAAASUVORK5CYII=",
					callback: () => {
						lf.current.openSelectionSelect();
						lf.current.once("selection:selected", () => {
							lf.current.closeSelectionSelect();
						});
					},
				},
				{
					type: "bpmn:startEvent",
					label: "开始",
					text: "开始",
					icon: "data:image/png;base64,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",
				},
				{
					type: "bpmn:userTask",
					label: "用户任务",
					text: "用户任务",
					icon: "data:image/png;base64,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",
				},
				{
					type: "bpmn:serviceTask",
					label: "系统任务",
					text: "系统任务",
					icon: "data:image/png;base64,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",
				},
				{
					type: "bpmn:exclusiveGateway",
					label: "条件判断",
					text: "条件判断",
					icon: "data:image/png;base64,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",
				},
				{
					type: "bpmn:endEvent",
					label: "结束",
					text: "结束",
					icon: "data:image/png;base64,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",
				},
			]);

			lf.render({});
			lf.translateCenter();
		}
	}, []);

	return (
		<div className="h-full">
			<div className="mt-5 h-3/4" ref={refContainer}></div>
		</div>
	);
}

我的 Vite 版本：6.0.7

logicflow/core版本

2.0.10

logicflow/extension版本

2.0.14

logicflow/engine版本

No response

浏览器&环境

Chrome

[CraneReturn]

为啥往lf实例身上加dnd的配置 可以看下官方的写法 LogicFlow.use(DndPanel); lf.extension.dndPanel.setPatternItems([])
http://logicflow.cn/tutorial/extension/dnd-panel