SwiftUI @EnvironmentObject error: may be missing as an ancestor of this view

if you are using sheet ore navigation you have to pass the environment Object maybe its a bug of swiftUI but it works for me in Xcode 11.5:

.sheet(isPresented: $show){

The whole issue is very easy to fix just add self.networkManager @ EarthQuakeList.swift

.sheet(isPresented: $showEditPage) { 
                            return EditPage().environmentObject(self.networkManager)

I got the reason and inspired from article: https://github.com/peterfriese/Swift-EnvironmentObject-Demo