Fatal error: Uncaught Error: Interface "Symfony\Component\Form\DataTransformerInterface" not found in /home/palabrebel/www/kimai/src/Form/DataTransformer/StringToArrayTransformer.php:18 Stack trace: #0 {main} thrown in /home/palabrebel/www/kimai/src/Form/DataTransformer/StringToArrayTransformer.php on line 18