Client Security Hash Project

So I have been working on this assignment for awhile and have restarted it several times. I have now finished the SHA1 Workflows and the system1 workflows up to the extract work items workflows. I have initialized it in the init workflow in the main . However when I run my program it runs enough to log into the acme site and then it stops. I open the output and get these errors:

System error at initialization: Cannot set unknown member ‘{http://schemas.microsoft.com/netfx/2009/xaml/activities/presentation}VirtualizedContainerService.HintSize’. at Source: System.Xaml

“message”: "Attach SHA1 Online Browser: Cannot find the UI element corresponding to this selector: "

“message”: "Invoke SHA1_Close workflow: Cannot find the UI element corresponding to this selector:

I don’t know what to do because my sha1 workflows are fine every time I go back to check them.