Can't download

I encountered this issue yesterday on a personal project. If you have tried another browser and clearing cache already and that has not worked, you may need to do a bit of digging into the various pieces to see if there is an element of the design that is causing the error, in my case it was a font that was no longer available in the font menu. You can start by duplicating your current project multiple times, then try deleting each of the clips and downloading. If one doesn't download and the other does, you know the issue is with the one clip. Then start deleting different layers and clicking download to try and pinpoint the problematic piece of the project. Make sure you refresh between each edit prior to clicking download.