From this link
Solved: CityEngine Trial License - Esri Community
it was suggested this link
Free Trial - ArcGIS CityEngine
it will be country dependent though
hi Dan - shows this message
Hi All,
We have re-keyed the license for 2022.0. That means you will need to re-authorize your existing licenses (be they Single Use, Concurrent Use, or Named User) so that they will work with CityEngine 2022.0, once it is officially released.
Please follow the instructions given in the ArcGIS CityEngine - ArcGIS CityEngine (esri.com) early adopter forum under GETTING STARTED > Installing CityEngine 2022.0 Beta
Thanks and happy testing,
Thomas F
sounds like the authorization file you have is for a different version. check with your administrator, or you may not be eligible for that version