Fatal error: Uncaught Error: Class 'Contao\CoreBundle\DataContainer\PaletteManipulator' not found in /home/cthadmin/public_html/app/Resources/contao/dca/tl_form_field.php:6 Stack trace: #0 {main} thrown in /home/cthadmin/public_html/app/Resources/contao/dca/tl_form_field.php on line 6