After installation of Xcode 9 Beta 3, I receive the message " The operation couldn’t be completed. (Mach error -308 - (ipc/mig) server died)" when I try to run my application on the simulator. Any clue why this error occurs?

When using the AVSpeechSynthesizer() , I get an error after a couple of seconds :"IPCAUClient.cpp:139 IPCAUClient: can't connect to server (-66748) <0x104309130>", and then it speaks the text. The second time I call speak, there is no delay and error and it speaks immediately. Where does this error and delay come from and how can I resolve it? Intialization code: self.audioSession = AVAudioSession.sharedInstance() // 2) handle audio session first, before trying to read the text do { try audioSession.setCategory(.playback, mode: .voicePrompt, options: .duckOthers) try audioSession.setActive(false) } catch let error { Logger.model.debug("❓\(error.localizedDescription)") } speechSynthesizer = AVSpeechSynthesizer() speechSynthesizer.usesApplicationAudioSession = true Speak code: let utterance = AVSpeechUtterance(string: text) utterance.preUtteranceDelay = 0.1 utterance.rate = 0.5 utterance.pitchMultiplier = 0.75 utterance.prefersAssistiveTechnologySettings = false self.speechSynthesizer.speak(utterance) The last statement gives this error message!

In the code below a receive an error "A stored property cannot be named 'description'" . If I change the property "description" to "description1" the error is gone. I'am using Xcode 15b8. Anyone having the same problem import Foundation import SwiftData @Model class Category { var name: String var description: String init(name: String, description: String) { self.name = name self.description = description } }