Hi,
I completely misunderstood this as the controller based deployment, now realised that you are using IAP not the controller based APs :)
please ignore that command it is not applicable for the IAP.
please verify the uplink, it was showing as the access link, please ensure the following things are in place,
1. what is the VLAN mapped to the SSID ?
2. try to change the IAP uplink as the trunk as shown bellow.
select "More-->Wired"
Select "Default_Wired_Port_Profile ( Profile which is mapped to the 0/0) and select Edit :
Apply the required changes ,
Please feel free for any further help on this.