Element type is invalid

[nagarjuna993]

I am unable to use the component. When i am importing ToastController and using it, i am getting the below 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.

[gerysk]

Instead of <ToastController /> use <ToastContainer />. Also at that same file add import 'react-toastify/dist/ReactToastify.css'; Wasted a few hours trying to figure it out. Thank you README.md -.-