SampleData on Previews @MainActor issue

Hi all,

I am trying to render my SwiftUI views that uses SwiftData classes using sample data using the approach shown in the example code of wwdc2023-10196:

@MainActor #Preview {
    TripsWidgetEntryView()
        .modelContainer(PreviewSampleData.container)
}

Unfortunately this seems no longer valid. Indeed I get this error:

I then tried to remove the @MainActor as suggested, but the error in then moved to another level:

What do you suggest to be the best approach to have back my preview working?

I am using Xcode Beta 4 - 15A5195m