I just tried that and I didn't work!!!! The hair has worked before. Specifically, before the free base game update. I messaged the creator, and it doesn't seem like there's anything wrong with it for them or other people. So, I guess it's just me. I was debating on going and redownloading all of the hair that I know is missing and maybe that might work.
Could you PM me the link to the hair you're using. I can try if it works for me tomorrow.
Please don't post here in this thread as links are not allowed publicly on AHQ.
