I faced the same issue today when migrating to watchOS 10 and widgetkit complications. What finally helped was to add supportedFamilies to WidgetConfiguration (the body parameter of the @main Widget struct) @main struct WatchWidget: Widget { let kind: String = "WatchWidget" var body: some WidgetConfiguration { StaticConfiguration(kind: kind, provider: Provider()) { entry in if #available(watchOS 10.0, *) { WatchWidgetEntryView(entry: entry) .containerBackground(.fill.tertiary, for: .widget) } else { WatchWidgetEntryView(entry: entry) .padding() .background() } } .configurationDisplayName("WATCH-WIDGET") .description("WATCH-WIDGET") .supportedFamilies([.accessoryCorner, .accessoryCircular, .accessoryInline, .accessoryRectangular]) //<-- this } } Once this was done the migration started working!

Same here. XCode Version 15.0.1 (15A507)