Thanks for letting me know. You won't be able to get the CG using hair 8 at the moment - but it should work with a different style.
The file was misnamed as hair9 instead of hair8 so Renpy is searching for hair8 and not finding it. That's the issue. Until I push out a patch, playing with hair 8 in silver will unfortunately break at Yren's CG.
I'll push out a patch soon but it'll probably be about 15-20 minutes before it shows up!
~Esh