itch.io

It's the installer, I download the demo and try to launch the very first thing that gets downloaded from the site and it either fails download in the site or doesn't fail but closes right after I open it

Everytime I try to download the demo it downloads and then i try to launch it and it then syas download failed and i cant find it anywhere in my files or apps. The only thing i can do is try redownloading it and then it does the same thing, What do I do? Edit: I found it in my files but it opens for a second then immediately closes