Fatal error: Uncaught Error: Class 'Concrete\Core\Foundation\Command\Command' not found in /home/gmcguire/public_html/concrete5/concrete/src/Board/Designer/Command/ScheduleCustomElementCommand.php:10 Stack trace: #0 {main} thrown in /home/gmcguire/public_html/concrete5/concrete/src/Board/Designer/Command/ScheduleCustomElementCommand.php on line 10