404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=_XlP_kgsVNyRg3sw_5-wkva-ja1E7rYQcLRMQnrJqNqqp_vBfaiX-ZRT1s-jXYT2rMgSJwrrnxjt8RZVTqeNjcytpLSU8lrjsW0y45qpmM8%2C was not found on this server. That’s all we know.