Warning: Undefined variable $categoriesController in /var/www/libros/public/views/categories.php on line 4

Fatal error: Uncaught Error: Call to a member function getWithBooks() on null in /var/www/libros/public/views/categories.php:4 Stack trace: #0 {main} thrown in /var/www/libros/public/views/categories.php on line 4