Uncaught Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function but got: object

Question

I am getting this error:

Uncaught Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/funct

Answer 1

In my case (using Webpack) it was the difference between:

import {MyComponent} from '../components/xyz.js';

vs

import MyComponent from '../components/xyz.js';

The second one works while the first is causing the error. Or the opposite.