Identify the error in this SwiftUI view using @ObservedObject:

Identify the error in this SwiftUI view using @ObservedObject:

class TimerModel: ObservableObject {
  @Published var time = 0
}

struct TimerView: View {
  @ObservedObject var timer: TimerModel
  var body: some View {
    Text("Time: \(timer.time)")
  }
}