Fatal error: Uncaught Error: Class "FOS\UserBundle\Model\UserManager" not found in C:\xampp\htdocs\BK\bateriasec\vendor\friendsofsymfony\user-bundle\Doctrine\UserManager.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\BK\bateriasec\vendor\friendsofsymfony\user-bundle\Doctrine\UserManager.php on line 21