404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=4DYqN3LU3_eOM8XbEKhKjr6hXgLmpMZOW8cR_odDO00-26789O9NbdwqNdde6zx0gAVb780UJ-ivZOVqChIA9srLHGtP0ZV2oS4G7sPeXhU%2C was not found on this server. That’s all we know.