Event 224 of the event sheet 1:
You are using subevents, sub-events only occurs when the events above them are true, and of course, the variable action of the dog cannot be equal to both "left" and "right" at the same time
Also try not to use the "Else" condition for instances, since it does not pick the good instances in most cases
And also, I suggest you not to have too many opened layout and event sheets in the editor, my computer wasn't responding (my computer is bad but it is still one of the cause of regular crashing issue for some users)