It seems I had missed-typed one of the character names for Unions and Intersections. The character of Jia Shu Ling was originally typed as Jai, not Jia.
Most times these sort of typo's in names don't make a difference because you can always make up new names anyway, but I actually chose the name specifically due to meaning, so it kind of annoyed me. So, I just had to do a search and replace through the other 23 characters I had already done and fix it up.
Oh well, it's fixed now before the game starts, and that's the main thing.
For those who are curious, Jia means beautiful, while Jai doesn't have any meaning that I can find.