Hello there!
As shared by my colleague @Ubi-Keo, this issue should now be resolved and you should be able to successfully install TU 1.3.1 without encountering a download loop!
If you are encountering any further trouble when downloading TU 1.3.1, please don't hesitate to update us within this thread so we can investigate further.
@HT89488 - Thank you for taking the time to share your feedback with us. I apologise for any inconvenience that was caused by this issue, and have forwarded your concerns to the dedicated teams. If you encounter any further trouble with Ubisoft Connect, I recommend sharing this report in our dedicated player support forums for the launcher.
Thank you!