I'm using the prerelease tool in iTunesConnect where you can distribute the app to a group of testers. It seems though that after some days the app crashes immediately after start (just after the splash screen shown). No error logs.
I'm wondering if this has to do with the 30days expiration that all TestFlight apps seems to have, or maybe it's something in my code that causing it?
The next time a user attempts to launch the beta app, they will get a dialog box saying "YOURAPPNAME" Beta Has Expired, and the app will not launch.
The app should not crash (nor run), as your question describes.