Hey there, I took a look at the issue and it seems v23 of the app isn't able to extract the .rar (for the Windows build) as it is currently.
The good news is that the next version of the app (v25) installs it correctly. If you wait long enough, the problem will resolve itself ;) However I'd recommend using butler to push the windows build of the game instead, you can find more information here: https://itch.io/docs/itch/integrating/quickstart.html