Symptoms
After upgrading to K2 4.7, we are not able to activate the K2 App to Sharepoint.
Diagnoses
This was because there were SP2010 web parts for K2 in the site web part gallery.
The client upgraded from SP2010 andgt SP2013 and we suspect this is how they got there.
Resolution
After removing the "K2 Worklist.dwp" and "K2TaskList.webpart" bits from the "web part gallery" we were able to activate the app successfully.
