SwiftUI -> Thread 1: Fatal error: No observable object of type MyObject.Type found (EnvironmentObject in sheet)
You have to pass your environment object to BixiStationDetailView, otherwise it won't have anything to bind to its @EnvironmentObject.
.sheet(isPresented: self.$isModalOpen) { BixiStationDetailView(station: self.station) .environmentObject(self.bixiModel)}Since you're presenting BixiStationDetailView as a sheet, it isn't a subview of your CardView and therefore doesn't inherit its @EnvironmentObject.