404. That’s an error.
The requested URL /add?source=atgs&feedurl=https%3A%2F%2Fsurveys.nfer.ac.uk%2F%3Frss%26list%3Dmain%26lang_id%3D7 was not found on this server. That’s all we know.
/add?source=atgs&feedurl=https%3A%2F%2Fsurveys.nfer.ac.uk%2F%3Frss%26list%3Dmain%26lang_id%3D7