Cubase Pro 10 - 30 day trial issue

Hello
I’ve downloaded Cubase Pro 10 and installed it. I received my 30 day trial in my email.
When I launch cubase , I input the license key , which is verifies as a 30 day trail
It then opens to another window called “no elicenser selectable - currently there is no USB e-licenser connected to your computer”
Does any know how I resolve this, as I would like to get started with Cubase before I hopefully purchase the full version.
Thanks
F

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