As @darkpaw already mentioned: It was indeed a storyboard problem.
Flutter:
We moved the storyboards in a different folder to set the App-Language in the App-Store (App is only available in German). This was done a couple of months ago - during iOS 15 / Flutter 2.10.5. It all worked fine - even on other OS languages.
Now, using the same code, the app crashes when using a different OS language than, in our case, German.
A detailed description can be found here: https://stackoverflow.com/a/75145629/2104195
Topic:
UI Frameworks
SubTopic:
UIKit
Tags: