Element type is invalid: expecte

今天在用react写后台出现了一个错误，找了好久才找到

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.

有说是因为没有使用 export default 进行导出，但是我的代码里面都是这样写的，最后发现是我的父级路由没有绑定component导致的

最后将代码修改成绑定组件即可