The product might be registered to a different account, or it’s possible, though unlikely, that you never registered the SeL with your original license.
If that’s the case you will have to go through tech support.
Note that you can download a trial of Cubase 12 that works for 30 days.
I am only saying this:
And to allow you to use the program while you sort this out, you can download the trial of Cubase Pro 12.
There’s no more I can do to help you, I’m afraid, I’m just a long-term user of Steinberg products, and I don’t work for them
Is it possible you once used a My Steinberg account associated with a different email address and registered with that?
This might help as it is kind of related. It’s a point of contact at least:
I have gotten the same problem,too.There is no product information under the soft-elicense.(cubase 11)
By the way,I haven’t changed the email or any information.
Please start a new topic if you also need help with reactivating a Soft-eLicenser.