大小写问题

routes/web.php

@@ -923,5 +923,5 @@ Route::group([
 Route::group([
     'prefix' =>  '/background_check',
 ], function (Router $router){
-    $router->get('/', 'Web\backgroundCheck\IndexController@index')->name('backgroundCheck.index');
+    $router->get('/', 'Web\BackgroundCheck\IndexController@index')->name('backgroundCheck.index');
 });