Fatal error: Uncaught Error: Class 'App' not found in /opt/lampp/htdocs/tre-ext.sigmabiomedical.com/site/app/Controller/30_nov_20_AppointmentsController.php:2 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/tre-ext.sigmabiomedical.com/site/app/Controller/30_nov_20_AppointmentsController.php on line 2