We also ran into this exact issue, Even though the thread is old but I am replying to hopefully help someone else in same situation.
You will need to open a TAC case, as they will need to check few queries in your clearpass database.
In our case it had to do with the license sync between Aruba Cloud Central Server.
The timestamp between "app_registration" and "license_details" mismatch caused it in our case. Our TAC engineer had to remove the license, delete it, and reapply the license And in the aruba central server, they disabled and re-enabled this license serial number so it can sync with correct time.
Normal user can't access this level of control to fix it themselves.
Hope this helps.
ZA