You may have noticed when you went to post there was a message that said to read the instructions first. One of the things you’re instructed to do there is give a version number. Since that’s missing, we can only help so much.
That said, I have seen plenty of people have problems with Rufus before. I would suggest trying Etcher instead. And absolutely make sure that the self check that runs at the beginning of the installation is successful.
If that fails to prove helpful, let us know your version number, your partition scheme, and your Calamares log (see $HOME/.cache/Calamares/session.log and use the “Hide Details” option under the gear icon so that it doesn’t take up too much screenspace).