I'm trying to launch the game, but the launcher just displays this message and doesn't ever seem move past it.
Hi CaliCaliCali!
Please verify your Siege game files in Uplay, and then follow these troubleshooting steps as well.
If the problem persists after these steps and you need further assistance, please reach out to our team at support.ubi.com by clicking on "Contact Customer Support" at the bottom of the page. Our technical support team will be able to help you out from there. Thanks!