@Shubham Here is the console log. There is no Debug.Logs as this is just the UAR face tracking sample scene in isolation.
2022-02-23 18:12:24.680309+0000 Zappar3[743:134541] Built from ‘2020.3/staging’ branch, Version ‘2020.3.9f1 (108be757e447)’, Build type ‘Release’, Scripting Backend 'il2cpp’
2022-02-23 18:12:24.681608+0000 Zappar3[743:134541] MemoryManager: Using ‘Default’ Allocator.
GfxDevice: creating device client; threaded=1
Initializing Metal device caps: Apple A11 GPU
Initialize engine version: 2020.3.9f1 (108be757e447)
2022-02-23 18:12:25.616767+0000 Zappar3[743:134541] Unbalanced calls to begin/end appearance transitions for <UnityViewControllerStoryboard: 0x11a0541d0>.
2022-02-23 18:12:25.617168+0000 Zappar3[743:134541] Unbalanced calls to begin/end appearance transitions for <UnityDefaultViewController: 0x11a053540>.
UnloadTime: 4.468250 ms
2022-02-23 18:12:28.016507+0000 Zappar3[743:134541] WARNING: -[<AVCaptureVideoDataOutput: 0x811bb060> setMinFrameDuration:] is deprecated. Please use AVCaptureDevice setActiveVideoMinFrameDuration
2022-02-23 18:12:28.639628+0000 Zappar3[743:134541] Started camera for device com.apple.avfoundation.avcapturedevice.built-in_video:1
2022-02-23 18:12:28.644539+0000 Zappar3[743:134541] DID GET RESPONSE 403
2022-02-23 18:12:28.648791+0000 Zappar3[743:134541] DID COMPLETE NO ERROR
UNLICENSED! Please register this app’s identity (com.DefaultCompany.Zappar3) at https://my.zap.works/distribution-hub/.
To note there is no error when the app freezes up. I get the popup about registering the identity too zappar then leave the tracking that works for about 30s after that. No more messages are posted in the log as there’s nothing going on. Then the app freezes and no log is posted for why the freeze is happening.
Its also to not the the camera feed is much darker than what the iPhone camera app displays as if the Gamma levels are not correct when running the Unity app but this is a separate issue entirely.