Target class [] does not exist

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PHP

Laravel

Iam new to laravel 9 and iam getting this error

Target class [Countries\CountryController] does not exist.

this is web.php

<?php

use Illuminate\Support\Facades\Route;

Auth::routes();

Route::group(['middleware'=>['guest']],function(){
    Route::get('/', function()
    {
        return view('auth.login');
    });
});

Route::group(
    [
        'prefix' => LaravelLocalization::setLocale(),
        'middleware' => [ 'localeSessionRedirect', 'localizationRedirect', 'localeViewPath','auth' ]
    ], function(){ 
        Route::get('/dashboard', [App\Http\Controllers\HomeController::class, 'index'])->name('dashboard');

        Route::group(['namespace' => 'Countries'], function() {
            Route::resource('Countries', 'CountryController');
        });
    });

Controller has been put in another folder app\Http\Controllers\Countries

<?php 

namespace App\Http\Controllers\Countries;

use Illuminate\Http\Request;

class CountryController extends Controller 
{
  /**
   * Display a listing of the resource.
   *
   * @return Response
   */
  public function index()
  {
    return view(admin.content.countries);
  }  
}

?>

i tries to add this in route file but still the same error coming

use App\Http\Controllers\Countries;

What I have tried:

i tries to add this in route file but still the same error coming

use App\Http\Controllers\Countries;