Fatal error: Uncaught Error: Class 'App\Http\Controllers\Controller' not found in /home/demohatinco/public_html/parhwalo_backend/app/Http/Controllers/Api/Online_Teacher_Controller.php:21 Stack trace: #0 {main} thrown in /home/demohatinco/public_html/parhwalo_backend/app/Http/Controllers/Api/Online_Teacher_Controller.php on line 21