Uncaught TypeError: Cannot read properties of null (reading ‘Column1’)

I can’t render array of objects from slaves.json file. It shows me ‘Uncaught TypeError: Cannot read properties of null (reading ‘Column1′)’

How can i render this?
Help.please

App.js

import './App.css';
import slaves from './slaves.json';

console.log('slaves', slaves);

const arr = slaves.map((obj) => obj.Column1);

function App() {
  return (
    <div className="App">
      <div>
        {arr.filter((obj) => {
          return <div>{obj}</div>;
        })}
      </div>
    </div>
  );
}

export default App;

slaves.json