BottomSheet crashes iOS app on appearing

[varyamereon]

I am trying to test BottomSheet on iOS 17.2 in the simulator. I have implemented the bottom sheet as per the instructions in the Readme, and it looks the same as the sample apps. It seems to work fine on Android, but on iOS at InitializeComponent() on the ContentView I get this exception:

System.ArgumentNullException: Value cannot be null. (Parameter 'source')
   at ObjCRuntime.Runtime.ThrowException(IntPtr gchandle) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/ObjCRuntime/Runtime.cs:line 2594
   at UIKit.UIApplication.UIApplicationMain(Int32 argc, String[] argv, IntPtr principalClassName, IntPtr delegateClassName) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:line 60
   at UIKit.UIApplication.Main(String[] args, Type principalClass, Type delegateClass) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:line 94
   at AlternativeBottomSheetTest.Program.Main(String[] args) in /Users/wbeal/Code/AlternativeBottomSheetTest/AlternativeBottomSheetTest/Platforms/iOS/Program.cs:line 13
2024-02-10 13:24:32.551836+0100 AlternativeBottomSheetTest[33257:1418024] Unhandled managed exception: Value cannot be null. (Parameter 'source') (System.ArgumentNullException)
   at ObjCRuntime.Runtime.ThrowException(IntPtr gchandle) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/ObjCRuntime/Runtime.cs:line 2594
   at UIKit.UIApplication.UIApplicationMain(Int32 argc, String[] argv, IntPtr principalClassName, IntPtr delegateClassName) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:line 60
   at UIKit.UIApplication.Main(String[] args, Type principalClass, Type delegateClass) in /Users/builder/azdo/_work/1/s/xamarin-macios/src/UIKit/UIApplication.cs:line 94
   at AlternativeBottomSheetTest.Program.Main(String[] args) in /Users/wbeal/Code/AlternativeBottomSheetTest/AlternativeBottomSheetTest/Platforms/iOS/Program.cs:line 13

Doesn't provide me with much of a description of what the issue is I'm afraid!