Fatal error: Uncaught Error: Interface 'Concrete\Core\Board\Instance\Slot\Rule\FormatterInterface' not found in /home/geofieldwa/www/concrete/src/Board/Instance/Slot/Rule/AbstractFormatter.php:7 Stack trace: #0 {main} thrown in /home/geofieldwa/www/concrete/src/Board/Instance/Slot/Rule/AbstractFormatter.php on line 7