There was a little bug for me, after finishing the battle, there is scene with janna face and screen froze there, but game didn't crash, I hit enter and fight started and screen fixed back on fighting scenes, I submitted to her this time and it was OK. I think it happens when losing to her by losing all the hp.Still bugged you mean an error message while you are starting a fight with her or after the battle etc... ?
but I guess since there are no more content after losing to her, it was nothing that bothers me and most likely will be fixed when you add content for after the fight.
By the way, thanks for the update, glad you're back. Really love your work.