Symptoms
Workflows Do Not Assign Tasks Anymore
Diagnoses
Picker used as Destination from Item Ref returns empty (an activity with a client event should at least have one destination) (SharePoint Integration Helper Methods andgt Get K2 FQN for SharePoint users)
Resolution
This is a bug and we created a codefix for this, the fix will ship in Appit 1.5 Update early next year. This issue might be in Blackpearl 4.7 as well (not confirmed) if so please contact support.