Fatal error: Uncaught Error: Interface 'Concrete\Core\Health\Grade\GradeInterface' not found in /home/gmcguire/public_html/concrete5/concrete/src/Health/Grade/AbstractGrade.php:4 Stack trace: #0 {main} thrown in /home/gmcguire/public_html/concrete5/concrete/src/Health/Grade/AbstractGrade.php on line 4