404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=MDPaB0pN4XiRiYwKMqOPA7RS9mecKucFpyUcasqw78vHPmc1qZjYfiryyFu01USZxEXONmt6JRrQZPiKIMObqQ%2C%2C was not found on this server. That’s all we know.