Symptoms

SmartObject does not exist on the server. Name: *"GUID'*
This caused the Client not to be able to expand the Category that this SmartObject was situated in.
 

Diagnoses

After checking the K2 Database

SELECT *
FROM MK2].]SmartBroker].]SmartObject]
where SmartObjectGUID=*"GUID'*

No such smo existed

 

Resolution

We removed the incorrect entries out of the Categories.Data table in the K2 DB.