I would try a using a different browser or possibly downloading from the Itch.io app. Let me know if either of those work. If not, I can refund you or send you the file directly.
I've tried a few different browsers, didn't even know there was a itch.io app, i'll give that a shot, but if I have the same issue, I'll just ask for the direct files from you, I adore your work, and thank you for being so quick to respond!