The QS_Client directives can only be used outside of virtual host configurations, so I can't figure out what directory QS_ErrorPage will look in with a URL of (say) /my_error_page.html It certainly cannot find that page in the default virtual host directory, as I have tried that. I've also tried placing the page in the directory of the virtual host which has been blocked by the QS_Client directive - but it doesn't find it there either. And I tried using a complete URL, including host, with QS_Error_Page,...