From this picture, it appears that the error is happening while it is processing the positionTree data. So, it suggests that you have a positionTree XML installed that references that specific animation (which does not exist in the animation XML files).
I don’t see how the two could be related. CWSS presumably works off of its own scripts that would be unaffected by AAF processes.
Original URL: https://www.loverslab.com/topic/97147-advanced-animation-framework/?do=findComment&comment=2481780