Fatal error: Uncaught Error: Class "Concrete\Core\Board\Instance\Slot\Rule\AbstractFormatter" not found in /home/elcrestweb/public_html/concrete/src/Board/Instance/Slot/Rule/BoardDesignerSharedSlotFormatter.php:7 Stack trace: #0 {main} thrown in /home/elcrestweb/public_html/concrete/src/Board/Instance/Slot/Rule/BoardDesignerSharedSlotFormatter.php on line 7