Fatal error: Uncaught Error: Class "Concrete\Core\Controller\ElementController" not found in /srv/disk3/2724534/www/transdoetaskforce.org/concrete/controllers/element/files/edit/thumbnail_editor/concrete_thumbnail_editor.php:8 Stack trace: #0 {main} thrown in /srv/disk3/2724534/www/transdoetaskforce.org/concrete/controllers/element/files/edit/thumbnail_editor/concrete_thumbnail_editor.php on line 8