Unable to load Family Activity Picker ScreenTimeAPI

I've created a test project in which I can successfully receive the FamilyControl authorization for the child device.

Then on the parent device(where the parent account is logged in as the iCloud account), I basically used the following test code as provided in the documentation FamilyActivityPicker

struct ExampleView: View {
  @State var selection = FamilyActivitySelection()
  @State var isPresented = false

  var body: some View {
    Button("Present FamilyActivityPicker") { isPresented = true }
    .sheet(isPresented: $isPresented) {
      FamilyActivityPicker(selection: $selection)
    }
    .onChange(of: selection) { newSelection in
      let applications = selection.applications
      let categories = selection.categories
      let webDomains = selection.webDomains
    }
  }
}

I get the following error on the view :

The operation couldn't be completed. (FamilyControls.ActivityPickerRemoteViewError error 1)

For authorization errors I was able to look into the FamilyControlsError enum in the FamilyControls framework, but I can't find an enum for ActivityPickerRemoteViewError.

Any idea as to why it's failing to load?

I believe I am using the right setup in terms of the account that I am logged in to. I do have the FamilyControl capability, and I was able to successfully provide authorization for the child. Is there any other prerequisite that needs to be done to load the FamilyActivityPicker?

Also, Do you know where I can find the error codes corresponding to ActivityPickerRemoteViewError ?

What does error 1 indicate?

I do see the following in the console logs :

2021-06-09 16:42:38.430112-0400 NN Family Control[849:38700] [lifecycle] [u 9F1F2B94-76F6-4D8F-ADE3-6D1C14EE5074:m (null)] [com.apple.FamilyControls.ActivityPickerExtension(1)] Connection to plugin interrupted while in use.
2021-06-09 16:42:38.476929-0400 NN Family Control[849:38704] [lifecycle] [u 9F1F2B94-76F6-4D8F-ADE3-6D1C14EE5074:m (null)] [com.apple.FamilyControls.ActivityPickerExtension(1)] Connection to plugin invalidated while in use.