I noticed this problem with the following software: https://thecatamites.itch.io/mouse-corp and https://pnjeffries.itch.io/spartan-procjam-edition . I tried this on Firefox. When I hit download, nothing happens. I tried enabling popups, disabling all my adblockers, even changing my DNS settings. None of these worked. I even tried installing Brave Browser and attempting the same thing, and it gave me the "thanks for downloading" popup, but the download didn't actually start. I also tried enabling "alternate download mode" and that didn't start the download either, although curiously it prevented the "thanks for downloading" popup from showing up on Brave.

I also tried downloading both of these software from the Itch app. It gave the following error: "htfs.Open (initial request): in conn.Connect, non-retriable error: in conn.tryConnect, got HTTP non-2XX: api.itch.io: HTTP 403: <?xml version="1.0" encoding = "UTF-8"?><Error><Code>SignatureDoesNotMatch</Code><Message>The request signature we calculated does not match the signature you provided. Check your secret access key and signing method.</Message></Error>"

Anyone have any idea what's causing these problems? I've downloaded other software on both the browser and the app without any issue, just these two in particular that haven't worked.