Laravel 8 return blank page

In controller;

 public function list_of_approved_policies(){
    
      dd("I am here");
      die(); 
    } 

In route

Route::get('/listofapprovedpolicies','MerchantDashboardController@list_of_approved_policies');

When I calling /listofapprovepolicies Laravel return just white blank page. How can i solve this problem ?

via Chebli Mohamed