404. That’s an error.

The requested URL /users/oauth/?server=facebook&nv_redirect=pEGoMcZwC60c6rCrGGA0Bkx34eySHnG5ExjKXlLVnmA7ULIM2pwwXBvDDwVxCnqdzERq0D8dxvYmB20guPuQ1w%2C%2C was not found on this server. That’s all we know.