I cant use my cubase 12, it tells me that I don’t have a license

I’m trying to use Cubase 12,
And it tells me that I don’t have a license,
I have a license that I upgraded from 11 to 12
And last month I started having a problem.
I would appreciate help urgently, I have a lot of projects that I am committed to and I can’t use 12,
I have 11, but how can I use 12?
please help

Cubase 12 no longer uses the Elicenser. Do a search for Steinberg Activation Manager

For more info from forum members, add your OS platform and version, and your system info to your profile.