Have issues where login fail with Walgreens and ring apps. I haven't tried all my apps, but seems to be a systemic problem. I have tried removing apps and re-installing apps and authentication with apps login respond with an error. No way of knowing if the problem is due to the app or the IOS.
Did you already try to force restart your iPhone after the update? You will not lose data.
Force restart iPhone - Apple Support
The next step would be setting it back to factory settings, to rule out a software issue:
Did you already try to force restart your iPhone after the update? You will not lose data.
Force restart iPhone - Apple Support
The next step would be setting it back to factory settings, to rule out a software issue:
Why is it that I update to IOS 15.3 that apps I need to login to, but get an error at login.
