404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=aallJds3xmx9h-hLStFoXmcDQo7oW6eT7N21clKzzKsvPjyn3N6vvoQw2fVdgc7ZbeCdNM4oErCX8YqJAFs2xg%2C%2C was not found on this server. That’s all we know.