element type is invalid expected a string (for built-in components) or a class/function react native code example

Example 1: touchableopacity expected a string

This is probably caused by some JS module export/import issues
in your program, typically for one of the two reasons listed below:

- You forget to export, or you export something incorrectly
- You import something that doesn't exist, or you import something incorrectly

Example 2: element type is invalid expected a string

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

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

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