I'm still getting this error. Not sure how to fix, but I submitted a bug report.

I'm having this issue as well. I've ensured CD_entityName indexes are a part of each object in the cloudkit console. I've submitted feedback, but has anyone resolved this? Sync works when I initially install the app on both my devices, but if I remove the app from one and reinstall the error occurs during the syncing process.

I had this issue. I was trying to add two widgets to my project and realized that the intents (for the widget target they are named ConfigurationIntent) needed to have different names for each of the targets. Open the Intents file for the target, change the name, then change the name in the project itself, wherever ConfigurationIntent is in the file, replace with your new name. If the Custom name you choose were Today, the name to use in your project is TodayIntent(). IntentConfiguration(kind: kind, intent: TodayIntent.self, provider: Provider()) { entry in             TodayWidgetView(entry: entry)         }

Here is what I did to get it working, although it isn't what I wanted it does work, in case anyone else is attempting to pull from cloudkit+core data public db and has run into issues with the initial, on-launch, fetch -- This is how I got FetchRequest in SwiftUI working with my need to do additional things with those items as they are pulled into the app. In body of the main view, I call my model when the NavigationItem is being created, and ask it to finish setup for the current item.                         NavigationLink(destination: ItemDetailView(detailViewModel: ItemDetailViewModel(item: item, pairedFavorite: self.itemModel.pairedFavoriteForItem(cloudItem: Item), manager: self.itemModel))) { Text(item.name) And in the model, I have this method var fetchedAlreadyFavoritesReturnedEntities: Bool?     func pairedFavoriteForItem(cloudItem: Item) -> FavoriteItem {                  if allItems.contains(s) == false {             self.allItems.append(cloudItem)         }         if self.fetchedAlreadyFavoritesReturnedEntities == nil && self.allFavoriteItemObjects.isEmpty == true {             let request = NSFetchRequest<FavoriteItem>(entityName: "FavoriteItem")                                       request.sortDescriptors  = [NSSortDescriptor(key: "favoritedState", ascending: true)]             let favoriteRequestFRC =  NSFetchedResultsController(fetchRequest: request,                                                                  managedObjectContext: self.localManagedObjectContext,                                                                  sectionNameKeyPath: nil,                                                                  cacheName: nil)             favoriteRequestFRC.delegate = self             try? favoriteRequestFRC.performFetch()             let fetched: [FavoriteItem]? = favoriteRequestFRC.fetchedObjects                          if let f = fetched {                 self.allFavoriteItemObjects = Set<FavoriteItem>(f)             }             self.fetchedAlreadyFavoritesReturnedEntities = true         }         let results = self.allFavoriteItemObjects.filter {             return ($0.matchingItemUUID!.uuidString == cloudItem.uuid!.uuidString)         }         if results.isEmpty == false {             if let fave: FavoriteItem = results.first {                 s.isFavorite = fave.favoritedState             }             return results.first!         }         else {                         let newFavorite = self.makeFavoriteWithItem(cloudItem)                         self.allFavoriteItemObjects.insert(newFavorite)                                                  return newFavorite         }     }

I know there are some good functional open source options out there, like PageView. Using that until I can figure out what to do with TabView (if there is anything.)

Got the same problem... Mine works on the iPhone (hardware) and all the simulators, but not my apple watch device. Get the "Account temporarily unavailable due to bad or missing auth token" error. Beta 4.

I'm having the exact same issue.

So I followed these instructions https://stackoverflow.com/questions/40093585/swift-3-preload-from-sql-files-in-appdelegate/40107699 after finding this thread https://developer.apple.com/forums/thread/61745 and found it working well - the issue was that I needed to copy that seed database into the documents folder, then reference it there via NSPersistentStoreDescription, for anyone with the same circumstances.   if FileManager.default.fileExists(atPath:seedDataDestination.path) == false {                 do {                     try FileManager.default.copyItem(at: seededDataURL, to: seedDataDestination)                 } catch {                     print("Error copying seeded data to documents directory!")                 }           }             let persistentDescription = NSPersistentStoreDescription(url:seedDataDestination)

Wanted to follow up to say that the current functionality works when first launch is true, but otherwise loads the empty store. If I remove the first launch flag, any saves done don't persist.