Я не могу найти причину сбоя.Это сбой по поводу GameCenter в iOS12.
GameCenterFoundation
__27-[GKDispatchGroup perform:]_block_invoke.50
#0. Crashed: com.apple.main-thread
0 libdispatch.dylib 0x18bc156d8 dispatch_group_leave$VARIANT$armv81 + 132
1 GameCenterFoundation 0x1a64f8074 __27-[GKDispatchGroup perform:]_block_invoke.50 + 36
2 GameCenterUI 0x1a737b9f8 __84+[GKUIRemoteViewController viewControllerForExtension:inputItems:completionHandler:]_block_invoke_2 + 608
3 libdispatch.dylib 0x18bc44a38 _dispatch_call_block_and_release + 24
4 libdispatch.dylib 0x18bc457d4 _dispatch_client_callout + 16
5 libdispatch.dylib 0x18bc259e4 _dispatch_main_queue_callback_4CF$VARIANT$armv81 + 1008
6 CoreFoundation 0x18c195ec0 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
7 CoreFoundation 0x18c190df8 __CFRunLoopRun + 1924
8 CoreFoundation 0x18c190354 CFRunLoopRunSpecific + 436
9 GraphicsServices 0x18e39079c GSEventRunModal + 104
10 UIKitCore 0x1b877bb68 UIApplicationMain + 212
11 LOR iOS 0x10273e960 main (main.m:13)
12 libdyld.dylib 0x18bc568e0 start + 4