OK, that error message is actually expected: Dorico Pro 4 comes with a licence for the Olympus Micro choir samples, but the Dorico licence uses Steinberg Licensing, and Cubase 11 uses the eLicenser, so Cubase 11 doesn’t know about your Olympus Choir licence.
However, that shouldn’t make any difference to your ability to run Dorico, so I think that might be a separate issue.
I see you are running Windows - do you have a non-Latin character in your Windows username? If so you may be running into a known bug with the Steinberg Licensing system. We will be releasing a fix for this soon, but in the meantime you can turn on “Use Unicode UTF-8 for worldwide language support” as described in this thread, and that will also fix it: Steinberg Activation Manager keeps asking for activation - #6 by Richard_Lanyon