QR Code issue
? mark in window appears where QR code should be
iPhone 13, iOS 17
? mark in window appears where QR code should be
iPhone 13, iOS 17
If this is a third-party app, remove the app, update iOS, force-restart the iPhone, and re-install the app.
If that fails, contact the app vendor: Contact a third-party vendor - Apple Support
If this is an Apple app (Camera, Photos, etc), which app, and what have you already tried?
QR Code issue