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