iOS - record audio fails to record

Hi, I try to record audio on the iPhone with the AVAudioRecorder and Xcode 26.0.1.

Maybe the problem is that I can not record audio with the simulator. But there's a menu for audio.

In the plist I added 'Privacy - Microphone Usage Description' and I ask for permission before recording.

if await AVAudioApplication.requestRecordPermission() {
            print("permission granted")
            recordPermission = true
        } else {
            print("permission denied")
        }

Permission is granted.

let settings: [String : Any] = [
                    AVFormatIDKey: kAudioFormatMPEG4AAC,
                    AVSampleRateKey: 12000,
                    AVNumberOfChannelsKey: 1,
                    AVEncoderAudioQualityKey: AVAudioQuality.high.rawValue
                ]

recorder = try AVAudioRecorder(url: filename, settings: settings)

let prepared = recorder.prepareToRecord()
print("prepared started: \(prepared)")
let started = recorder.record()
print("recording started: \(started)")

started is always false and I tried many settings.

Error messages

AddInstanceForFactory: No factory registered for id <CFUUID 0x600000211480> F8BB1C28-BAE8-11D6-9C31-00039315CD46
       AudioConverter.cpp:1052  Failed to create a new in process converter -> from  0 ch,  12000 Hz, .... (0x00000000) 0 bits/channel, 0 bytes/packet, 0 frames/packet, 0 bytes/frame to  1 ch,  12000 Hz, aac  (0x00000000) 0 bits/channel, 0 bytes/packet, 1024 frames/packet, 0 bytes/frame, with status -50
     AudioQueueObject.cpp:1892  BuildConverter: AudioConverterNew returned -50
 from:  0 ch,  12000 Hz, .... (0x00000000) 0 bits/channel, 0 bytes/packet, 0 frames/packet, 0 bytes/frame
to:    1 ch,  12000 Hz, aac  (0x00000000) 0 bits/channel, 0 bytes/packet, 1024 frames/packet, 0 bytes/frame
prepared started: true
     AudioQueueObject.cpp:7581  ConvertInput: aq@0x10381be00: AudioConverterFillComplexBuffer returned -50, packetCount 5
recording started: false

All examples I find are the same, but apparently there must be something different.