Workflows not appearing when adding items in Package and Deployment

Symptoms

When attempting to add items into a package, some workflows are nowhere to be found in the "Add Items" list. 
 

Diagnoses

Missing Workflows are visible from the K2 Workspace Management Console.

Resolution

-Stop the K2 blackpearl Server.
-Navigate to “C:ProgramDataSourceCodeHostServerRuntimeCache” (It’s in a hidden folder so you need to make it visible).
-Delete all contents of that folder.
-Restart K2 blackpearal Server.