React-Bootstrap 不适用于服务器端渲染 React App？

Question

我跟着 this tutorial 做了一个服务器端渲染网络应用，但是当我尝试实现 React-Router 时，我收到以下错误

Error: Element type is invalid: expected a string (for built-in components) or a 
class/function (for composite components) but got: undefined. You likely forgot to export
your component from the file it's defined in, or you might have mixed up default and named imports.

我一直在寻找如何解决它，但我似乎找不到解决方案，任何可能的输入都会很棒。

谢谢

Answer 1

原来问题出在导入中，必须按如下方式导入

import Button from 'react-bootstrap/Button'
import Form from 'react-bootstrap/Form'

也只是加载到引导文件的标准