Hi all. I've read all the posts related to CF_IS_OBJC, including this one, but since I don't have an Objective-C background and mostly work with Swift and SwiftUI, I'm struggling to fully understand the recommendations or how to address this issue. Could someone explain it to me in simple terms (like I'm 5) and provide a step-by-step guide on what to do? This crash has affected 66 devices over the past month. Crashed: com.apple.main-thread 0 CoreFoundation 0xf878 CF_IS_OBJC + 24 1 CoreFoundation 0x17f58 CFArrayGetCount + 32 2 CoreGraphics 0x322a1c CGPDFTaggedNodeEnumerateChildren + 60 3 CoreGraphics 0x322880 CGPDFTaggedNodeGetBounds + 244 4 PDFKit 0x5524 -[UICGPDFNodeAccessibilityElement isAccessibilityElement] 5 UIAccessibility 0x48518 ___axuiElementForNotificationData_block_invoke + 28 6 UIAccessibility 0x35678 __94-[NSObject(AXPrivCategory) _accessibilityFindFirstAXDescendantPassingTest:byYieldingElements:]_block_invoke_2 + 36 7 UIAccessibility 0x3534c __96-[NSObject(AXPrivCategory) _accessibilityEnumerateAXDescendants:passingTest:byYieldingElements:]_block_invoke + 60 8 UIAccessibility 0x359d0 __57-[NSObject(AXPrivCategory) _accessibilityFindDescendant:]_block_invoke_2 + 60 9 UIAccessibility 0x1ec98 -[NSObject(AXPrivCategory) accessibilityEnumerateContainerElementsWithOptions:usingBlock:] + 548 10 UIAccessibility 0x35858 __57-[NSObject(AXPrivCategory) _accessibilityFindDescendant:]_block_invoke + 176 11 UIAccessibility 0x3539c __96-[NSObject(AXPrivCategory) _accessibilityEnumerateAXDescendants:passingTest:byYieldingElements:]_block_invoke + 140 12 UIAccessibility 0x359d0 __57-[NSObject(AXPrivCategory) _accessibilityFindDescendant:]_block_invoke_2 + 60 13 UIAccessibility 0x1ec98 -[NSObject(AXPrivCategory) accessibilityEnumerateContainerElementsWithOptions:usingBlock:] + 548 14 UIAccessibility 0x35858 __57-[NSObject(AXPrivCategory) _accessibilityFindDescendant:]_block_invoke + 176 15 UIAccessibility 0x3539c __96-[NSObject(AXPrivCategory) _accessibilityEnumerateAXDescendants:passingTest:byYieldingElements:]_block_invoke + 140 16 UIAccessibility 0x359d0 __57-[NSObject(AXPrivCategory) _accessibilityFindDescendant:]_block_invoke_2 + 60 17 UIAccessibility 0x1ec98 -[NSObject(AXPrivCategory) accessibilityEnumerateContainerElementsWithOptions:usingBlock:] + 548 18 UIAccessibility 0x35858 __57-[NSObject(AXPrivCategory) _accessibilityFindDescendant:]_block_invoke + 176 19 UIAccessibility 0x3539c __96-[NSObject(AXPrivCategory) _accessibilityEnumerateAXDescendants:passingTest:byYieldingElements:]_block_invoke + 140 20 UIAccessibility 0x359d0 __57-[NSObject(AXPrivCategory) _accessibilityFindDescendant:]_block_invoke_2 + 60 21 UIAccessibility 0x1ec98 -[NSObject(AXPrivCategory) accessibilityEnumerateContainerElementsWithOptions:usingBlock:] + 548 22 UIAccessibility 0x35858 __57-[NSObject(AXPrivCategory) _accessibilityFindDescendant:]_block_invoke + 176 23 UIAccessibility 0x3539c __96-[NSObject(AXPrivCategory) _accessibilityEnumerateAXDescendants:passingTest:byYieldingElements:]_block_invoke + 140 24 UIAccessibility 0x35918 __57-[NSObject(AXPrivCategory) _accessibilityFindDescendant:]_block_invoke + 368 25 UIAccessibility 0x3539c __96-[NSObject(AXPrivCategory) _accessibilityEnumerateAXDescendants:passingTest:byYieldingElements:]_block_invoke + 140 26 UIAccessibility 0x35294 -[NSObject _accessibilityEnumerateAXDescendants:passingTest:byYieldingElements:] + 244 27 UIAccessibility 0x355d0 -[NSObject _accessibilityFindFirstAXDescendantPassingTest:byYieldingElements:] + 272 28 UIAccessibility 0x35788 -[NSObject(AXPrivCategory) _accessibilityFindDescendant:] + 100 29 UIAccessibility 0x48280 _axuiElementForNotificationData + 276 30 UIAccessibility 0x347c _massageAssociatedElementBeforePost + 36 31 UIAccessibility 0x2648 _UIAXBroadcastMainThread + 292 32 libdispatch.dylib 0x213c _dispatch_call_block_and_release + 32 33 libdispatch.dylib 0x3dd4 _dispatch_client_callout + 20 34 libdispatch.dylib 0x125a4 _dispatch_main_queue_drain + 988 35 libdispatch.dylib 0x121b8 _dispatch_main_queue_callback_4CF + 44 36 CoreFoundation 0x56710 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 16 37 CoreFoundation 0x53914 __CFRunLoopRun + 1996 38 CoreFoundation 0x52cd8 CFRunLoopRunSpecific + 608 39 GraphicsServices 0x11a8 GSEventRunModal + 164 40 UIKitCore 0x40a90c -[UIApplication _run] + 888 41 UIKitCore 0x4be9d0 UIApplicationMain + 340 42 UIKitCore 0x638384 keypath_get_selector_hoverStyle + 11024 43 Wisconsin State Journal 0x3b4ae8 main + 4299246312 (AppDelegate.swift:4299246312) 44 ??? 0x1b7239e4c (Missing) com.apple.uikit.eventfetch-thread 0 libsystem_kernel.dylib 0x1808 mach_msg2_trap + 8 1 libsystem_kernel.dylib 0x5008 mach_msg2_internal + 80 2 libsystem_kernel.dylib 0x4f20 mach_msg_overwrite + 436 3 libsystem_kernel.dylib 0x4d60 mach_msg + 24 4 CoreFoundation 0x53f5c __CFRunLoopServiceMachPort + 160 5 CoreFoundation 0x53600 __CFRunLoopRun + 1208 6 CoreFoundation 0x52cd8 CFRunLoopRunSpecific + 608 7 Foundation 0xc7e4c -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 212 8 Foundation 0xc7c9c -[NSRunLoop(NSRunLoop) runUntilDate:] + 64 9 UIKitCore 0x41e640 -[UIEventFetcher threadMain] + 420 10 Foundation 0xde718 __NSThread__start__ + 732 11 libsystem_pthread.dylib 0x606c _pthread_start + 136 12 libsystem_pthread.dylib 0x10d8 thread_start + 8 com.google.firebase.crashlytics.MachExceptionServer 0 Wisconsin State Journal 0x83b668 FIRCLSProcessRecordAllThreads + 392 (FIRCLSProcess.c:392) 1 Wisconsin State Journal 0x83ba48 FIRCLSProcessRecordAllThreads + 423 (FIRCLSProcess.c:423) 2 Wisconsin State Journal 0x849c5c FIRCLSHandler + 34 (FIRCLSHandler.m:34) 3 Wisconsin State Journal 0x84a460 FIRCLSMachExceptionServer + 521 (FIRCLSMachException.c:521) 4 libsystem_pthread.dylib 0x606c _pthread_start + 136 5 libsystem_pthread.dylib 0x10d8 thread_start + 8 Thread 0 libsystem_kernel.dylib 0x1808 mach_msg2_trap + 8 1 libsystem_kernel.dylib 0x5008 mach_msg2_internal + 80 ...