Fatal error: Uncaught Error: Class 'App\Http\Controllers\Controller' not found in /home/edmedu/www/edmclass.com.bak/edmclass-front/app/Http/Controllers/common/ClassroomController.php:16 Stack trace: #0 {main} thrown in /home/edmedu/www/edmclass.com.bak/edmclass-front/app/Http/Controllers/common/ClassroomController.php on line 16