TestFlight build always crashes on launch screen?

Hello community,

I’m pretty new to the Unity world but I have more than 10 years of professional C# expirence as of right now (WPF, ASP, Xamarin). Since two days now, I’m trying to get my first iOS TestFlight build with Unity running but so far without any result. It always crashes on the Unity launch screen already without even displaying the Unity logo. Is there any way to debug with Unity on a iOS device? Or can I find out what is happening somehow? The game runs fine in the editor and with a Windows build so I don’t think that this is the issue.

The only thing I can see is a warning that launchscreen images are no longer supported with iOS 13 and I should use storyboards instead (which are also in my project?). The target device for testing is a iOS 13 and iPadOS 13 device.