Hi guys!
I have upgraded to version 5.9. However, the forms and views cannot open. When I do some research it said, the version must be upgraded one by one (K2 Blackpearl 4.7 > K2 Five 5.6 or 5.7 > K2 Five 5.9).
So I check the history, and it is sequence which is correct.
However error is still showing when I open the form. Why?:
