404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=-UwfREbMB7RnCLmU16xBagfhBOVM8oEIMWwWLt9Bv_B3kmCFNMcaboy8H1qmvpkLMiAPYJaKLARksKWPWXPMmA%2C%2C was not found on this server. That’s all we know.