Fatal error: Uncaught Error: Interface 'Symfony\Component\Form\DataTransformerInterface' not found in /home/itscm/dev.its.cm/itsgateway/vendor/friendsofsymfony/user-bundle/Form/DataTransformer/UserToUsernameTransformer.php:24 Stack trace: #0 {main} thrown in /home/itscm/dev.its.cm/itsgateway/vendor/friendsofsymfony/user-bundle/Form/DataTransformer/UserToUsernameTransformer.php on line 24