404. That’s an error.
The requested URL /add?source=atgs&feedurl=http%3A%2F%2Fwww.maliny.tk%2Fwp-content%2Fthemes%2Fdarkooo-theme%2Fcss%2Flightbox.css was not found on this server. That’s all we know.
/add?source=atgs&feedurl=http%3A%2F%2Fwww.maliny.tk%2Fwp-content%2Fthemes%2Fdarkooo-theme%2Fcss%2Flightbox.css