Upgrade to Cubase Pro 9

I’ve just received a mail with an offer for an upgrade to Cubase 9.
I actually own an old Cubase Studio 4 and I want to upgrade to Cubase Pro 9. But the given code for the operation does not work (see attached picture).
Any idea ?

Hi and welcome,

Isn’t the promotional code UPGRADE17, instead of UPDATE17, what you wrote? See this page, please.

The upgrate plan release my friend until 31.8