In CST Studio Suite 23 learning edition, I performed the Time-simulation in high-frequency of an easy dipole model to calculate S-parameters and it works. But after the simulation, I can see the results, but when I try to calculate Z and Y matrix an error about the license appears and I cannot perform other operations: 

Time Domain Solver (HEX): License missing

Post-processing: License missing
Post-processing error: 'Could not initialize post-processing step results.'

P.S. I already try to change version and reinstall the software without solution.

CST Studio Suite ​​​​​​​