Controller Based WLANs

What happens if the server derived role through the server derivation rule doesn't exist on the controller ?
 

Priority has given to the role derived from the server derivation rule, however if the role doesn't exist on the controller, user will be placed on the default role of the respective authentication method.

For example in case of 802.1x authentication the user will be placed on the "802.1X Authentication Default Role" of the aaa profile.