Ah, I wasn't aware there was a desktop app version of itchio. I would search for Cupid Axis in the desktop browser version (Google, Firefox, Bing, etc) and download from there. If you click it then it will automatically download on the browser version. Since there are no files to install (you can just play directly from the folder once downloaded), that might be why it is having that error on the desktop app! I hope this helps, but if you still have issues even with the browser version, I will see if I can upload to an alternate location and link it on the page 🍀