Problems installing Cubase 13 on a clean Windows pro 10 64 bit

I have a clean Windows 10 64 bit installation. I downloaded Steinberg Download Assistant. I then clicked on “Install” on Cubase 13. Once it successfully installed I clicked on Cubase 13 icon to open it and it opens Activation Manager. It opens the sign in page. .When I sign in, it takes me to “Authorise Steinberg Activation Manager”. My only choice is then to click on “Try Again” and nothing happens. What now?