@thewanted - I too got this message on the BETA version.
If you log on here: https://login.audi.com/login
This should give you access to download the maps - at least it does with me.
Hey,
Thanks for the heads up. Whilst your link didn't resolve my issue, it did help to point me in the right direction.
The site was directing me to https://login.audi.com/login/#/en/US/home, but when I forced it to go to https://login.audi.com/login/#/en/GB/home instead, I was able to download the maps.