My project was working fine, with no build errors and we were able to upload to App Store Connect.

When reopening the project I get the following errors for List.

Extra arguments at positions #1, #2 in call

List modifier errors

Cannot infer contextual base in reference to member ‘sidebar’
Cannot infer contextual base in reference to member ‘hidden’

Code:

var sidebar: some View {
    List(selection: $selection) {. <-- Extra arguments at positions #1, #2 in call
        
        NavigationLink(destination:
            HomeView(), tag: NavigationItem.home, selection: $selection) {
                Label("Home", systemImage: "house")
            }
            .tag(NavigationItem.home)
        
        Section("Messages") {
            ForEach(cvm.chats.indices, id: .self) { index in
               ChatRow(index: index)
            }
        }
        
    }
    .listStyle(.sidebar).  <-- Cannot infer contextual base in reference to member 'sidebar'
    .scrollContentBackground(.hidden) <-- Cannot infer contextual base in reference to member 'hidden'
}

Elsewhere in the project we get the following errors

Trailing closure passed to parameter of type ‘Decoder’ that does not
accept a closure

Code:

    Section {

   List { <-- Trailing closure passed to parameter of type 'Decoder' that does not accept a closure
        Section {
            NavigationLink(destination:Detail() ) {
                Row(menu: menu, item: menu.items[0])
            }
            .buttonStyle(PlainButtonStyle())
        }
        .listRowBackground(Color.clear)
    }
    .listRowSpacing(12) <-- Value of type 'List' has no member 'listRowSpacing'
    .scrollContentBackground(.hidden) <-- Cannot infer contextual base in reference to member 'hidden'
    .listRowBackground(Color.clear)
    .frame(maxHeight: .infinity) <-- Cannot infer contextual base in reference to member 'infinity'
    .frame(maxWidth: .infinity) <-- Cannot infer contextual base in reference to member 'infinity'