'Warning: React.jsx: type is invalid -- expected in Laravel

I am new in React. I am using React in Laravel. I am trying to learn SPA using React in Laravel from this tutorial.

I got an error Warning:

React.jsx: 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.

Check the render method of `Main`.
    at Main

Please Help. Thanks in Advance.



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