It has happened to me a few times already. I have a workflow that is working. Sometime later (some event ocurred midtime, like turning computer on/off, locking/unlocking screen, I run the workflow again and the workflow BUGS at CLICK IMAGE activities, that were working previously.
I then select GRAB FROM SCREEN, to try to fix that activity, but when I do so, it changes to a completely black screen, just with a thin red line mouse cursor and red line rectangle below the cursor.
Any idea what might be the cause?