Fatal error: Uncaught Error: Interface "Concrete\Core\Board\Instance\Slot\Content\ObjectInterface" not found in /home/believers/public_html/concrete/src/Board/Instance/Slot/Content/SummaryObject.php:18 Stack trace: #0 {main} thrown in /home/believers/public_html/concrete/src/Board/Instance/Slot/Content/SummaryObject.php on line 18