I recently had a huge issues in getting an Electronic Travel Application (permit) for an upcoming trip to Australia. And I know that the same app (modified for countries) is used by a lot of countries in Europe, so maybe this will help. Cut to the chase, I was never able to get the downloaded ETA app to work. It kept hanging at the taking photo of my ugly mug, not accepting it. I was finally able to get the photo done by using a friend's brand new 2025 Samsung. (iPhone 13 Pro / iOS 18.5)
:) I had the same problem with the UK ETA recently. Downloaded the app, all was fine until the photo (Pixel 8 phone). At age 70+ the repeated error message was that it was unacceptable. Studying the sample pics I wondered if my saggy baggy eyes were the issue if they looked closed?
Yup! I stood in brighter light and kept my eyes as wide open as possible. It worked! I look either terrified or insane, but...ok!
Thank you for your useful tip! Mine is likely less so, but you never know!