404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=4_RCsRLXWO_wHzdbURwHsryevElE_J5oV4cr9jKbLANqRy8g_o3yrJTcKadYsALfZ6tN9YZPViZMEmNG54dVoHSQQSbyeGlcrk7rBzQ07dE%2C was not found on this server. That’s all we know.