404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=M538tyJz2GMrn60g9SBWiMV-mPyHouthuPccZZiXZu4mCQb0JuH--l0e_U1A6VGm1loW5aZd0RfdASK1SZ-WuQ%2C%2C was not found on this server. That’s all we know.