Thanks for your reply but sadly the app does not work on any iPhones running iOS17.
Have you tried today to use the Live Link Face on iPhone to record? Perhaps you granted the app ‘camera permission’ before they updated the iOS?
As far as my experience of installing the app onto an iPhone today, sadly it does not request camera permission and therefore the app does not appear in the settings as an option to ‘grant permission’.
Someone posted about this issue as a review on the iTunes site almost two months ago. Sadly they’ve not fixed it yet.