Hi there,
Fearlisha09! I apologize for the confusion this may have caused. You may be experiencing this error because the TTS is not open yet. Once it becomes open to everyone, you should be able to download and play it with no errors or issues. Please keep an eye on the
official Twitter page for Siege for updates on when the new TTS patch comes out. If you continue experiencing issues, do not hesitate to create a ticket at
support.ubi.com. Our team would be happy to help!