Getting error code when I try to add a book title and description.

<?php
require_once__DIR__ . '/../inc/bootstrap.php';

$bookTitle = request()->get('title');
$bookDescription = request()->get('description');

try {
    $newBook = addBook($bookTitle, $bookDescription);

    $response = \Symfony\Component\HttpFoundation\Response::create(null, \Symfony\Component\HttpFoundation\Response::HTTP_FOUND, ['Location' => '/books.php']);
    $response->send();
    exit;
} catch (\Exception $e) {
    $response = \Symfony\Component\HttpFoundation\Response::create(null, \Symfony\Component\HttpFoundation\Response::HTTP_FOUND, ['Location' => '/add.php']);
    $response->send();
    exit;
}