Ch 7 Activity Recognition - Code will not run fails ContentView.swift

[edmtekx]

Ch 7 code compiles and builds fine, however it fails with a run time error in ContentView.swift: (Did not type code in - took it straight from this Git repo)

SwiftUI:0: Fatal error: No ObservableObject of type ActivityTracker found. A View.environmentObject(_:) for ActivityTracker may be missing as an ancestor of this view.

The failure is at this line:
let newActivity = tracker.currentActivity

Built with Xcode 12.5.1 on an Intel MBP machine for iPhone X

[Joost703]

I ran into the same error. Have you managed to solve it?

[edmtekx]

No unfortunately I have not been able to solve it. The authors don't seem to be interested in replying to the issue. I have since abandoned my attempts to use the book - again because of the authors (apparent) lack of interest in supporting their book.