Fatal error: Uncaught Error: Class "App\Http\Controllers\Controller" not found in /home/highfiv1/public_html/crm/modules/MailClient/app/Http/Controllers/MailTrackerController.php:21 Stack trace: #0 {main} thrown in /home/highfiv1/public_html/crm/modules/MailClient/app/Http/Controllers/MailTrackerController.php on line 21