Debug

app/Providers/RouteServiceProvider.php

@@ -57,6 +57,7 @@ class RouteServiceProvider extends ServiceProvider
                         return response()->json([
                             'errcode' => 404,
                             'message' => 'Not Found',
+                            'X-Forwarded-For' => request()->header('X-Forwarded-For'),
                         ], 404);
                     });
                 });