I was also having this issue with UCCX 11.0. Fresh install, and when I hit next at this screen without changing anything, I received this same error.
What I did was request a demo license for my version of UCCX through the License Registration Portal. Took several hours, but I received a new demo license. I used the license to get around this Issue.
I still don't understand why the demo license that comes with fresh install did not work, but this is what I did to resolve this error.