My app has buttons to set mapView.preferredConfiguration = MKStandardMapConfiguration() // and then mapView.preferredConfiguration = MKImageryMapConfiguration() This works fine unless I zoom in with: self.mapView.region = MKCoordinateRegion(MKMapRect(origin: MKMapPoint(self.coordinate), size: MKMapSize(width: 1000.0, height: 1000.0))) Then I switch between configurations and quickly crash. iOS 16.4. Happens in the simulator or on device. Anyone else seen this?

I have a catalyst app that uses an MKMapView. If I build the app on Xcode 11.2 under Catalina all is well. If I build under Big Sur the map doesn't appear when running on Catalina. In the log I see: "Could not instantiate class named MKModernCompassView because no class named MKModernCompassView was found; the class needs to be defined in source code or linked in from a library (ensure the class is part of the correct target)" The map shows just fine on Big Sur. Has anyone else seen this? Here's the stack trace: ( 0   CoreFoundation                      0x00007fff365a8b57 _exceptionPreprocess + 250 1   libobjc.A.dylib                     0x00007fff6f2595bf objcexceptionthrow + 48 2   CoreFoundation                      0x00007fff365a89b5 +[NSException raise:format:] + 189 3   UIFoundation                        0x00007fff674a353d UINibDecoderDecodeObjectForValue + 360 4   UIFoundation                        0x00007fff674a38bb UINibDecoderDecodeObjectForValue + 1254 5   UIFoundation                        0x00007fff674a33c8 -[UINibDecoder decodeObjectForKey:] + 251 6   UIKitCore                           0x00007fff770e4aab -[UIView initWithCoder:] + 1051 7   MapKit                              0x00007fff71e84988 -[MKMapView initWithCoder:] + 96 8   UIFoundation                        0x00007fff674a36c0 UINibDecoderDecodeObjectForValue + 747 9   UIFoundation                        0x00007fff674a33c8 -[UINibDecoder decodeObjectForKey:] + 251 10  UIKitCore                           0x00007fff770e20cd -[UIRuntimeConnection initWithCoder:] + 125 11  UIFoundation                        0x00007fff674a36c0 UINibDecoderDecodeObjectForValue + 747 12  UIFoundation                        0x00007fff674a38bb UINibDecoderDecodeObjectForValue + 1254 13  UIFoundation                        0x00007fff674a33c8 -[UINibDecoder decodeObjectForKey:] + 251 14  UIKitCore                           0x00007fff776e8ab7 -[NSCoder(UIIBDependencyInjectionInternal) decodeObjectsWithSourceSegueTemplate:creator:sender:forKey:] + 450 15  UIKitCore                           0x00007fff770e08f3 -[UINib instantiateWithOwner:options:] + 1147 16  UIKitCore                           0x00007fff770e7495 -[UIViewController loadViewFromNibNamed:bundle:] + 379 17  UIKitCore                           0x00007fff76ee362d -[UIViewController loadView] + 177 18  UIKitCore                           0x00007fff76e91484 -[UIViewController loadViewIfRequired] + 172 19  UIKitCore                           0x00007fff76e913c5 -[UIViewController view] + 27 20  UIKitCore                           0x00007fff76ed897d -[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:] + 1130 21  UIKitCore                           0x00007fff76ed84ff -[UITabBarController transitionFromViewController:toViewController:] + 59 22  UIKitCore                           0x00007fff76ed83a5 -[UITabBarController setSelectedViewController:] + 427 23  UIKitCore                           0x00007fff76edfb9c -[UITabBarController setSelectedViewController:] + 109 24  UIKitCore                           0x00007fff77419849 -[UITabBarController tabBarItemClicked:] + 518 25  UIKitCore                           0x00007fff77153727 -[UIApplication sendAction:to:from:forEvent:] + 83 26  UIKitCore                           0x00007fff772d0798 -[UITabBar sendAction:withEvent:] + 565 27  UIKitCore                           0x00007fff77153727 -[UIApplication sendAction:to:from:forEvent:] + 83 28  UIKitCore                           0x00007fff7715c245 -[UIControl sendAction:to:forEvent:] + 241 29  UIKitCore                           0x00007fff7715a2f5 -[UIControl sendActionsForEvents:withEvent:] + 410 30  UIKitCore                           0x00007fff772d248e -[UITabBar buttonUp:] + 113 31  UIKitCore                           0x00007fff77153727 -[UIApplication sendAction:to:from:forEvent:] + 83 32  UIKitCore                           0x00007fff7715c245 -[UIControl sendAction:to:forEvent:] + 241 33  UIKitCore                           0x00007fff7715a2f5 -[UIControl sendActionsForEvents:withEvent:] + 410 34  UIKitCore                           0x00007fff7715bcea -[UIControl touchesEnded:withEvent:] + 544 35  UIKitCore                           0x00007fff7713b02f -[UIWindow sendTouchesForEvent:] + 1512 36  UIKitCore                           0x00007fff7711767d -[UIWindow sendEvent:] + 4472 37  UIKitCore                           0x00007fff7711595f -[UIApplication sendEvent:] + 364 38  UIKit                               0x00007fff706da2ca -[UIApplicationAccessibility sendEvent:] + 85 39  UIKitCore                           0x00007fff77113d11 _dispatchPreprocessedEventFromEventQueue + 7836 40  UIKitCore                           0x00007fff76fe7c7b handleEventQueueInternal + 6303 41  UIKitCore                           0x00007fff76fe5e66 handleHIDEventFetcherDrain + 130 42  CoreFoundation                      0x00007fff3652cd52 CFRUNLOOPISCALLINGOUTTOASOURCE0PERFORMFUNCTION + 17 43  CoreFoundation                      0x00007fff3652ccf1 CFRunLoopDoSource0 + 103 44  CoreFoundation                      0x00007fff3652cb0b CFRunLoopDoSources0 + 209 45  CoreFoundation                      0x00007fff3652b83a CFRunLoopRun + 927 46  CoreFoundation                      0x00007fff3652ae3e CFRunLoopRunSpecific + 462 47  HIToolbox                           0x00007fff35157abd RunCurrentEventLoopInMode + 292 48  HIToolbox                           0x00007fff351577d5 ReceiveNextEventCommon + 584 49  HIToolbox                           0x00007fff35157579 BlockUntilNextEventMatchingListInModeWithFilter + 64 50  AppKit                              0x00007fff3379d039 DPSNextEvent + 883 51  AppKit                              0x00007fff3379b880 -[NSApplication(NSEvent) nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1352 52  AppKit                              0x00007fff3378d58e -[NSApplication run] + 658 53  AppKit                              0x00007fff3375f396 NSApplicationMain + 777 54  AppKit                              0x00007fff33a80e35 _NSApplicationMainWithInfoDictionary + 16 55  UIKitMacHelper                      0x00007fff67657e00 UINSApplicationMain + 322 56  UIKitCore                           0x00007fff76e3d1ff UIApplicationMain + 2130 57  WSPR Watch                          0x000000010f7680fa WSPR Watch + 28922 58  libdyld.dylib                       0x00007fff70401cc9 start + 1 )