php - Show a 404 page if route not found in Laravel 5.1 -

i trying figure out show 404 page not found if route not found. followed many tutorials, doesn't work. have 404.blade.php in \laravel\resources\views\errors

also in handler.php

public function render($request, exception $e) {     if ($e instanceof tokenmismatchexception) {         // redirect form example of how handle mine         return redirect($request->fullurl())->with(             'csrf_error',             "opps! seems couldn't submit form longtime. please try again"         );     }      /*if ($e instanceof customexception) {         return response()->view('errors.404', [], 500);     }*/      if ($e instanceof \symfony\component\httpkernel\exception\notfoundhttpexception)         return response(view('error.404'), 404);      return parent::render($request, $e); } 

if enter wrong url in browser, returns blank page. have

'debug' => env('app_debug', true), 

in app.php.

can me how show 404 page if route not found? thank you.

@tester.you problem solved still saying work in new project not in working project.for try below command in composer like

php artisan view:clear 

then try once unknown url .because same error faced before