I've had this problem in the past, and I thought it was because I was playing on the old version, but i've gotten the same error on both versions of the game. Midbattle, right after Siffrin's second dialogue about remembering their friends, I get the same error. Closing and reopening the game and downloading the patch so far hasn't worked, but the error happens in the same place iirc !! im unsure about what to do even though this has been reported before ahh