Loops & samples show a minus signal at Media window

I just bought the release of Cubase 14 (Upgrade). I downloaded some Guitars´Loops and Samples but I can not use them because a minus signal is showed. What does it mean? and Why I can not use them? I have updated the Download Assistant and Library Manager.
Thanks

Hi,

Make sure, the MediaBay component is up to date, please. Also make sure, you own the licenses for these files.

MediaBay component becomes updated automatically, once you start Steinberg Download Assistant.

Thanks Martin,