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