Here is the completely updated `question.php`. 

I added the missing `$breadcrumbs` array and defined `$category_name` and `$topic_name` right before the header is included. This ensures that `header.php` generates the correct Breadcrumb Schema, page title, and meta description for single question pages.

Replace your entire `question.php` with this:

```php
Connection failed: SQLSTATE[HY000] [2002] No such file or directory