404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=-V4S0YOi-KSrL2Y8D2Cn5RM17UhCpUzDCQgxfhYV4dr6mzoBigG0C8eh6gLVxsIPnMQ6DwZIYpzwSo0FwL4SG4iaA-QhcP3_EfvBVMGwoKw%2C was not found on this server. That’s all we know.