Fatal error: Uncaught Error: Class "App\Http\Controllers\Controller" not found in /home/steelman/public_html/advertise.steel-man.ir/back/app/Http/Controllers/ProductMaterialRelationController.php:8 Stack trace: #0 {main} thrown in /home/steelman/public_html/advertise.steel-man.ir/back/app/Http/Controllers/ProductMaterialRelationController.php on line 8