Fatal error: Uncaught Error: Class 'Symfony\Component\Security\Core\Exception\AuthenticationException' not found in C:\xampp\htdocs\plugins\Symfony\Component\Security\Core\Exception\AuthenticationCredentialsNotFoundException.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\plugins\Symfony\Component\Security\Core\Exception\AuthenticationCredentialsNotFoundException.php on line 21