404. That’s an error.
The requested URL /add?feedurl=http%3A%2F%2Fus%2Ejobs%2Frss%2Easp%3Fsi%3D1638031754%26so%3Drelevance was not found on this server. That’s all we know.
/add?feedurl=http%3A%2F%2Fus%2Ejobs%2Frss%2Easp%3Fsi%3D1638031754%26so%3Drelevance