React.createElement：type无效 - 期望一个字符串（对于内置组件）

Question

当我将我的组件从14号反应更新为15时发生警告

Warning: React.createElement: type is invalid -- expected a string (for built-in components) or a class/function (for composite components) but got: object. Check the render method of `Typeahead`.
    in Typeahead (created by Search)
    in div (created by Search)
    in Search (created by Home)
    in Home (created by RouterContext)
    in div (created by App)
    in App (created by RouterContext)
    in RouterContext (created by Router)
    in Router
    in Provider

我如何纠正这个问题

Answer 1

对我来说。我这样做会遇到这个警告：

React v15.5.0

{{1}}