PHP ERROR

I am coding a simple product crud application. I have a little issue, when i fill in the form and hit the create new product button, it goes to the database but the route returns PAGE NOT FOUND instead of redirecting to the products page.

the router.php file

<?php

namespace app;

class router
{
    public array $getRoutes = [];
    public array $postRoutes = [];
    public Database $db ;

    public function __construct(){
        $this -> db = new Database();
    }

    public function get($url, $fn){
        $this -> getRoutes[$url] = $fn;
    }
    public  function post($url, $fn){
        $this -> postRoutes[$url] = $fn;
    }
    public function resolve(){
        $currentUrl = $_SERVER['PATH_INFO'] ?? '/';
        $method = $_SERVER['REQUEST_METHOD'];

        if ($method === 'GET'){
            $fn = $this->getRoutes[$currentUrl] ?? null;
        }
        else{
            $fn = $this->postRoutes[$currentUrl] ?? null;
        }
        if ($fn){
            call_user_func($fn, $this);
        }
        else{
            echo "page not found";
        }
    }
    public function renderViews($view, $params = [])
    {
        foreach ($params as $key => $value){
            $$key = $value;
        }
        ob_start();
        include_once __DIR__."/views/$view.php";
        $content = ob_get_clean();
        include_once __DIR__."/views/_layout.php";
    }
}

here's the controller for it

public function create(Router $router)
    {
        $errors = [];
        $productData = [
            'title' => '',
            'description' => '',
            'image' => '',
            'price' => '',
        ];
        if ($_SERVER['REQUEST_METHOD'] === 'POST'){
            $productData['title'] = $_POST['title'];
            $productData['description'] = $_POST['desc'];
            $productData['imageFile'] = $_FILES['image'] ?? null;
            $productData['price'] = (float)$_POST['price'];

            $product = new products();
            $product->load($productData);
            $errors = $product -> save();
            if (empty($errors)){
                header('Location: /products');
                exit();
            }
        }