Working on Toon Boom Harmony from Dropbox

So I got an opportunity to do an In-Between Test. They send it to me via Dropbox, along with some instructions. However, they said I couldn’t download the file from Dropbox and work offline. So I tried to do that, but every time I click .xstage file, it says that something went wrong when previewing this image. Since I can’t ask the guys running the test themselves how to help, since knowing Dropbox is part of the test, I’m asking if anyone here knows how to work on Toon Boom Harmony from Dropbox? The test is only up for a week, so I hope someone responds soon.

Try the Toon Boom Discord