Uncaught Error: Element type is invalid: expected a string (for built-in components)

Question

I am getting this error. I have defined all components in index.js and I am using react-dom.

Webpacker itself is compiling with no err

Answer 1

This error is most likely caused because of your import statement. First this is weird import { App } from './components/CustomerSearch'; because here what i expect is that you have a file named CustomSearch.js but from your question it's AppComponent.js so i suggest you change it like this

import App from './components/AppComponent';

//here the name App doesn't matter as long as you're making a default export which you're doing.