Target class [App\Http\Controllers\BlogController] does not exist. http://localhost:8000/ code example

Example 1: laravel target class does not exist

Uncomment this line in app>>provider>>RouteServiceProvider.php file
// protected $namespace = 'App\\Http\\Controllers';

Example 2: Target class [Controller] does not exist.

Route::get('/users', [UserController::class, 'index']);