Fatal error: Uncaught Error: Class "App\Http\Controllers\Controller" not found in /home/steelman/public_html/advertise.steel-man.ir/back/app/Http/Controllers/SellInvoiceController.php:11 Stack trace: #0 {main} thrown in /home/steelman/public_html/advertise.steel-man.ir/back/app/Http/Controllers/SellInvoiceController.php on line 11