I need resolve this issue please because Cubase not opening

Hi Mohamed and welcome!

Since Steinberg moved away from dongle based licenses for some of their products (Such as Cubase 12), many users have run into issues and felt confused. (There are several posts already with similar issues as your own.)

Maybe this article will be of help:

i do my best and still not working… please i need help

Ok. Only a Steinberg employee can help you with this.

In order to grab their attention, can you please add the following tags to this thread:
# cubase-12
# issue
# steinberg-licensing

ok thank you for your time