404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=ftYrOSopCALSqfdq7ILS4KSDnYNRGvGwoQwL4BiXcAnLgYSKrBaYCyHOcX8_nKhrBO6UBpgxbKMLlSbKB--AqQ%2C%2C was not found on this server. That’s all we know.