hmm. I’m not sure I could help because I did fix it but then I went to add a new file (my beta testers sent feedback and I fixed some stuff) and then when I went to do that, it gave me the error again! But, I tried again and it worked. I’m really wondering if it’s an itch.io problem.
the originally way I solved it probably not helpful. I have a Mac computer. You can replace folders with images. I had the zip file in one of those. I figured that maybe the image attached to the folder was causing the problem. So I created a new, regular folder and the zip file worked.
But as I said above, it glitched again later for no reason. It seems really random. I’m hoping someone who actually has insight from their team can give an explanation because it doesn’t make sense.