I just purchased Vegas Pro 20 but see this error every time I try to run the installer application. My machine is very recently built and has an AMD Ryzen™ 9 7950X processor and AMD Radeon™ RX 6950 XT GPU, Windows 11. I've tried downloading from the email and account page and it always fails.
Wait- I spoke too soon. I got further than before and was able to install the software. However, when I was trying to register my product I kept seeing this:
"An online connection could not be established. Please make sure that your computer is correctly connected to the Internet. A firewall may also be blocking access." I disabled my firewall completely, restarted my PC and tried again and got the same error. Also tried the "Reset your internet settings" button below but it didn't help.
Try going to your MAGIX My Account / My Products and double-checking the serial number. And make sure that you are using the exact same email address in the registration/activation process that you used to purchase Vegas Pro.