I found whilst playing the game, (not entirely sure what i did to achieve this but it suddenly came up here is a screenshot of the error:
just tried to see if i could recreate the issue and found that the box comes up when i try to overwrite my save again hope this helps ^^
hey there @Lewright94… welcome aboard!
I’ll embed your image, as soon as I’m no longer stuck on this phone… and thanks for the followup!
Not sure if they are similar, related, or different entirely, but I got a couple of these myself in my last playthrough. See the attached video. First at the very start at 0:49—I only notice at 1:06 because it was strangely hidden on the right border of the screen—then another later on at 26:17. (Different ones.)