I had another situation involving SwiftUI with the same error message: Type 'any Identifiable' cannot conform to 'Identifiable'. I was building on normal project with Xcode 14 beta 2. The project doesn't build with or without the compiler flag -Xfrontend -enable-experimental-opened-existential-types as suggested in prev comment. import SwiftUI struct A: Identifiable{     let id = UUID() } struct B: Identifiable {     let id = UUID() } struct ContentView: View {     let container: [any Identifiable] = [A(), B()]     var body: some View {         VStack {             ForEach(container) { item in                 Text("\(item.id)")             }         }     } }