Hi! This is likely due to Patch 1.1 coming out a few days ago! I'm not sure if it'll fix the issue, but I just reuploaded the file and named it the same as before. If it still doesn't work, then you may need to set up your playthrough again, and sorry for the inconvenience!
That said, I highly recommend and you'll likely need to set up new saves before the next content update because of the features implemented in the patch, which may mess up references to your character in the future if using an old save. More details in the dev log!