404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=p00QAOptvRLTCfoOVxCunVv9EJwYojvgLHiYw305OK_AYXC2NpwZ9thRRDxw_MIRoyB40_TB95w6uOi4S9TBaTaWXWJFNBjqNQXnkBfMGFM%2C was not found on this server. That’s all we know.