Note: the download link is the one which starts the file download directly—and is normally different than the share link which presents you with a view to download the file (use https://rawdownload.now.sh/ if needed)
Did you do this step @Mauro ?
If you used dropbox, the sharelink normally ends with ?dl=0
You ll have to change that to ?raw=1
(or use https://rawdownload.now.sh/)