3.8 schemes are not supported on TUS yet and I did poke MonkeyIsland about this
don't worry, you're not the only one who's worried
...such things just can't get me worried, while I try to never be worried, and we can always "zip'em", or attach'em in a topic, or just wait until it'll be fixed - the easiest fix (or temporary fix) I can think of would be allowing
*.zip files to be uploaded as schemes