Fatal error: Uncaught Error: Class "Concrete\Core\Board\Command\BoardSlotCommand" not found in /home/rogertabor/public_html/updates/concrete-cms-9.1.1/concrete/src/Board/Command/AddCustomSlotToBoardCommand.php:5 Stack trace: #0 {main} thrown in /home/rogertabor/public_html/updates/concrete-cms-9.1.1/concrete/src/Board/Command/AddCustomSlotToBoardCommand.php on line 5