Fatal error: Uncaught Error: Class 'Symfony\Component\Form\Extension\Core\DataTransformer\BaseDateTimeTransformer' not found in C:\xampp\htdocs\plugins\Symfony\Component\Form\Extension\Core\DataTransformer\DateTimeToTimestampTransformer.php:24 Stack trace: #0 {main} thrown in C:\xampp\htdocs\plugins\Symfony\Component\Form\Extension\Core\DataTransformer\DateTimeToTimestampTransformer.php on line 24