Solution by @vadimwe worked for me. Thanks a lot!
sgrappatore
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sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService
it works great !!!
After several attempts and searches on google, I solved it simply by updating the package dependencies.
To date, the problem still has not been resolved. The thing that makes me angry is that as soon as I installed ver 16 of xCode, the download was performed and I also had the opportunity to try the "Predictive code". After a few days, xCode asked again to download and it DID NOT work anymore!!!!!
MacBook Pro Apple M3 Max
macOS Version 15.0 (Build 24A335)
Xcode 16.0 (23051) (Build 16A242d)