Five Figure Fanwork Exchange

I'm having trouble adding a relationship to my signup. I'm trying to add "Kamisato Ayaka/Ying | Lumine (Genshin Impact)" to my request 4, and I copy-pasted it directly from the tag set. Would it be possible to add it in for me, please? I'm getting this error:
These relationship tags in your request are not in the selected fandom(s), 原神 | Genshin Impact (Video Game): Kamisato Ayaka/Ying | Lumine (Genshin Impact) (Your moderator may be able to fix this.)