提供一个段落号，如何跳转到段落所在位置,我这样子为啥总是报错不生效

const app = this.WebOfficeInit?.Application
const doc = await app.ActiveDocument
const paragraphs = await app.ActiveDocument.Range.Paragraphs
const para = await paragraphs.Item(paraIndex)
if (para) {
  app.Selection.SetRange(para.Start, para.Start)
   await doc.ActiveWindow.ScrollIntoView(para)
   await range.Select()
}

<img src="https://solution-community.wps.cn/uploads/post/5Nx5sx2U85d.png" alt="image.png"/>

删除 app.Selection.SetRange(para.Start, para.Start)的报错 <img src="https://solution-community.wps.cn/uploads/post/5Nx5wHjzfvf.png" alt="image.png"/>