You can resolve this by prefacing Environment with SwiftUI. So, where you have @Environment(\.scenePhase) you will now have @SwiftUI.Environment(\.scenePhase) Worked for me at least

Evidently it did not want me to format that for some reason.

I am getting the same issue. In my case, in addition to the above message, it fails to run correctly in the simulator. (It attaches and stops at a black screen)