The crash details are below: Exception Type: SIGSEGV Exception Codes: SEGV_ACCERR at 0x14feb44f12c0 Crashed Thread: 0 Thread 0 name: MainThread Thread 0 Crashed: 0 libobjc.A.dylib 0x000000018667b008 objc_msgSend + 8 1 CoreFoundation 0x0000000189306088 -[__NSDictionaryM objectForKey:] + 168 2 CoreFoundation 0x000000018935c05c -[NSDictionary containsKey:] + 56 3 CoreFoundation 0x000000018935bce0 CFDictionaryContainsKey + 52 4 libGSFont.dylib 0x00000001a839f068 GSFontIsOverriddenSystemFontName + 32 5 CoreText 0x000000018b19b578 CopyAttributeForSystemFont+ 423288 (__CFString const*, __CFString const*) + 64 6 CoreText 0x000000018b19b150 AddVariationInfo+ 422224 (TCFMutableDictionary&, __CFString const*) + 60 7 CoreText 0x000000018b212564 MakeSpliceDescriptor+ 910692 (__CFString const*, unsigned long, __CFString const*, __CFString const*, __CFNumber const*, __CFNumber const*, unsigned int, CTFontTextStylePlatform, unsigned int, __CFNumber const*, __CFNumber const*, CTFontLegibilityWeight, __CFBoolean const*, void const*, __CFString const*) + 4500 8 CoreText 0x000000018b20da50 TDescriptorSource::CopySpliceFontForName+ 891472 (__CFString const*, __CFString const*, __CFNumber const*, __CFNumber const*, CTFontLegibilityWeight, __CFBoolean const*, __CFNumber const*, __CFString const*, __CFNumber const*, __CFNumber const*, __CFNumber const*, __CFNumber const*, unsigned int, __CFString const*) + 1384 9 CoreText 0x000000018b20aeb0 TDescriptorSource::CopySplicedDescriptorForName+ 880304 (__CFString const*, __CFString const*, __CFString const*, __CFNumber const*, __CFNumber const*, CTFontLegibilityWeight, __CFBoolean const*, __CFNumber const*, __CFString const*, __CFNumber const*, __CFNumber const*, __CFNumber const*, __CFNumber const*, unsigned int, __CFString const*) const + 172 10 CoreText 0x000000018b1377e4 TDescriptor::CreateMatchingDescriptorInternal+ 14308 (__CFSet const*, unsigned long) const + 2332 11 CoreText 0x000000018b13671c TDescriptor::InitBaseFont+ 10012 (unsigned long, double) + 76 12 CoreText 0x000000018b159408 TDescriptor::CreateMatchingDescriptor+ 152584 (__CFSet const*, double, unsigned long) const + 448 13 CoreText 0x000000018b1591dc CTFontCreateWithFontDescriptor + 68 14 CoreText 0x000000018b196098 CTFontCreateUIFontForLanguage + 44 15 UIFoundation 0x0000000194e0b02c UINewFont + 828 16 UIFoundation 0x0000000194e0a000 +[UIFont systemFontOfSize:traits:] + 44 17 UIKitCore 0x000000018bd12d50 -[_UITextAttributeDefaultCategories _genericDefaults:] + 112 18 UIKitCore 0x000000018bd129b8 -[_UITextAttributeDefaultCategories initWithUserInterfaceIdiom:] + 208 19 UIKitCore 0x000000018bd128c4 __48+[_UITextAttributeDefaults _unspecifiedDefaults]_block_invoke + 32 20 libdispatch.dylib 0x00000001914670d8 _dispatch_client_callout + 20 21 libdispatch.dylib 0x0000000191468920 _dispatch_once_callout + 32 22 UIKitCore 0x000000018bb0bf30 +[_UITextAttributeDefaults _unspecifiedDefaults] + 80 23 UIKitCore 0x000000018bb0be28 +[UILabel defaultFont] + 88 24 UIKitCore 0x000000018bafd050 __22-[UILabel _commonInit]_block_invoke_2 + 44 25 UIKitCore 0x000000018bbbb2a8 +[UIView _performSystemAppearanceModifications:] + 72 26 UIKitCore 0x000000018bbbb0b8 -[UILabel _commonInit] + 412 27 UIKitCore 0x000000018bbd2108 -[UILabel initWithFrame:] + 56 28 UIKitCore 0x000000018bc50f24 _UINavigationBarLargeTitleViewNewLabel + 28 29 UIKitCore 0x000000018bc50ed8 -[_UINavigationBarLargeTitleViewLayout initWithContentView:] + 76 30 UIKitCore 0x000000018bc50db8 -[_UINavigationBarLargeTitleView initWithFrame:] + 80 31 UIKitCore 0x000000018bc506f0 -[_UINavigationBarVisualProviderModernIOS prepare] + 608 32 UIKitCore 0x000000018bd84df4 -[UINavigationBar _commonNavBarInit] + 204 33 UIKitCore 0x000000018bd8441c -[UINavigationBar initWithFrame:] + 160 34 UIKitCore 0x000000018bb08a30 -[UINavigationController _navigationBarHiddenByDefault:] + 80 35 UIKitCore 0x000000018bc4f18c -[UINavigationController loadView] + 168 36 UIKitCore 0x000000018bb182c4 -[UIViewController loadViewIfRequired] + 156 37 UIKitCore 0x000000018bb18208 -[UIViewController view] + 24 38 UIKitCore 0x000000018be5936c -[UINavigationController pushViewController:transition:forceImmediate:] + 92 39 UIKitCore 0x000000018be59174 -[UINavigationController pushViewController:animated:] + 444 ... 41 UIKitCore 0x000000018be585d0 -[UINavigationController initWithRootViewController:] + 152 ... 46 UIKitCore 0x000000018bc4bb94 +[UIScene _sceneForFBSScene:create:withSession:connectionOptions:] + 1080 47 UIKitCore 0x000000018beda3e4 -[UIApplication _connectUISceneFromFBSScene:transitionContext:] + 812 48 UIKitCore 0x000000018bda0d5c -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 308 49 UIKitCore 0x000000018bda0a44 -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 288 50 FrontBoardServices 0x00000001a34f9918 __95-[FBSScene _callOutQueue_didCreateWithTransitionContext:alternativeCreationCallout:completion:]_block_invoke + 288 51 FrontBoardServices 0x00000001a34f9d08 -[FBSScene _callOutQueue_coalesceClientSettingsUpdates:] + 68 52 FrontBoardServices 0x00000001a34f977c -[FBSScene _callOutQueue_didCreateWithTransitionContext:alternativeCreationCallout:completion:] + 436 53 FrontBoardServices 0x00000001a351816c __93-[FBSWorkspaceScenesClient _callOutQueue_sendDidCreateForScene:transitionContext:completion:]_block_invoke.197 + 276 54 FrontBoardServices 0x00000001a34d7bf4 -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] + 168 55 FrontBoardServices 0x00000001a3516788 -[FBSWorkspaceScenesClient _callOutQueue_sendDidCreateForScene:transitionContext:completion:] + 468 56 libdispatch.dylib 0x00000001914670d8 _dispatch_client_callout + 20 57 libdispatch.dylib 0x000000019146ab1c _dispatch_block_invoke_direct + 284 58 FrontBoardServices 0x00000001a34d92b0 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 52 59 FrontBoardServices 0x00000001a34d9230 -[FBSMainRunLoopSerialQueue _targetQueue_performNextIfPossible] + 240 60 FrontBoardServices 0x00000001a34d9108 -[FBSMainRunLoopSerialQueue _performNextFromRunLoopSource] + 28 61 CoreFoundation 0x0000000189358f00 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28 62 CoreFoundation 0x0000000189358e94 __CFRunLoopDoSource0 + 176 63 CoreFoundation 0x00000001893569cc __CFRunLoopDoSources0 + 344 64 CoreFoundation 0x0000000189355b6c __CFRunLoopRun + 864 65 CoreFoundation 0x0000000189355368 CFRunLoopRunSpecific + 572 66 GraphicsServices 0x00000001d554c1c4 GSEventRunModal + 164 67 UIKitCore 0x000000018bea27d8 -[UIApplication _run] + 816 68 UIKitCore 0x000000018bf50b7c UIApplicationMain + 340