outline/app/scenes/Error404.js

// @flow
import * as React from 'react';
import CenteredContent from 'components/CenteredContent';
import PageTitle from 'components/PageTitle';
import Empty from 'components/Empty';

const Error404 = () => {
  return (
    <CenteredContent>
      <PageTitle title="Not Found" />
      <h1>Not found</h1>
      <Empty>
        We were unable to find the page you’re looking for. Go to the&nbsp;<a href="/">
          homepage
        </a>?
      </Empty>
    </CenteredContent>
  );
};

export default Error404;