Fatal error: Uncaught Error: Class "Illuminate\Support\ServiceProvider" not found in E:\xampp\htdocs\stms\vendor\brian2694\laravel-toastr\src\ToastrServiceProvider.php:6 Stack trace: #0 {main} thrown in E:\xampp\htdocs\stms\vendor\brian2694\laravel-toastr\src\ToastrServiceProvider.php on line 6