Fatal error: Uncaught Error: Class "Symfony\Component\Security\Http\Authenticator\AbstractLoginFormAuthenticator" not found in I:\www\picman\vendor\symfony\security-http\Authenticator\FormLoginAuthenticator.php:42 Stack trace: #0 {main} thrown in I:\www\picman\vendor\symfony\security-http\Authenticator\FormLoginAuthenticator.php on line 42