Fatal error: Uncaught Error: Interface 'Concrete\Core\Notification\Alert\Filter\FilterInterface' not found in /home/gmcguire/public_html/concrete5/concrete/src/Notification/Alert/Filter/WorkflowFilter.php:7 Stack trace: #0 {main} thrown in /home/gmcguire/public_html/concrete5/concrete/src/Notification/Alert/Filter/WorkflowFilter.php on line 7