Modifying the Model Code - Shirts page not working...

I am on Step 7 of Querying the Database with PHP - Modifying the Model Code, and Randy says that once change the get_products_all() method and comment out the code there and add the new code

    try {
        $results = $db->query("SELECT name, price, img, sku, paypal FROM products ORDER BY sku ASC");
    } catch (Exception $e) {
        echo "Data could not be retrieved from the database.";
        exit;
    }

    $products = $results->fetchAll(PDO::FETCH_ASSOC);    

    return $products;
}

that the shirts page and the search page will still work. For me, the search page is working but the shirts page is just giving me the index of /shirts.

I downloaded his project files and replaced all my code with his and I'm still having the same problem. Could it be a problem with my database?

I am now all the way on the last badge for this course and I have replaced all my code with Randy's for every step and the shirts page and shirts description pages still won't work. Everything else seems to be working fine.