Hello, I was wondering : what make the editor crash with this project ?
I tried to refresh all nodes of all blueprints, I tried to create a new project and migrate the assets, I disabled any plugin (even Fab), I changed the rendering dx 11 ↔ 12 ↔ vulkan and back. I removed any cache in the project and the user folder. I asked for assets validation = no issue. Nothing seems to have any effect. 
How can I find what it happening ? Everything works, I can play in the editor but not build and when I close Unreal Editor, I get a crash report. 
Thanks !
Build Crash
UATHelper: Packaging (Windows): LogWindows: Error: begin: stack for UAT
UATHelper: Packaging (Windows): LogWindows: Error: === Critical error: ===
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error: Fatal error!
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xffffffffffffffff
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffef29d963a UnrealEditor-CoreUObject.dll!UE::CoreUObject::Private::ResolveObjectHandle() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Public\UObject\ObjectHandle.h:229]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffef2e087bb UnrealEditor-CoreUObject.dll!FLinkerPlaceholderObjectImpl::ResolvePlaceholderValues() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderBase.cpp:86]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffef2e08243 UnrealEditor-CoreUObject.dll!FLinkerPlaceholderObjectImpl::ResolvePlaceholderValues() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderBase.cpp:110]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffef2e07c9d UnrealEditor-CoreUObject.dll!FLinkerPlaceholderBase::ResolvePlaceholderPropertyValues() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderBase.cpp:586]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffef2e06d17 UnrealEditor-CoreUObject.dll!FLinkerPlaceholderBase::ResolveAllPlaceholderReferences() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderBase.cpp:506]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffef2e06841 UnrealEditor-CoreUObject.dll!TLinkerImportPlaceholder::ResolveAllPlaceholderReferences() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderBase.inl:63]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffef2dd967e UnrealEditor-CoreUObject.dll!ULinkerPlaceholderClass::BeginDestroy() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderClass.cpp:34]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffef2ddc086 UnrealEditor-CoreUObject.dll!UObject::ConditionalBeginDestroy() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp:1220]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffef2d1448c UnrealEditor-CoreUObject.dll!UnhashUnreachableObjects() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp:5928]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffef2c98d44 UnrealEditor-CoreUObject.dll!IncrementalPurgeGarbage() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp:4523]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffef2cc186c UnrealEditor-CoreUObject.dll!PurgeAllUObjectsOnExit() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp:6120]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffef2e166c4 UnrealEditor-CoreUObject.dll!StaticExit() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp:5496]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffef2a4b117 UnrealEditor-CoreUObject.dll!TBaseStaticDelegateInstance<void __cdecl(void),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:779]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff63d00d6d1 UnrealEditor-Cmd.exe!TMulticastDelegate<void __cdecl(void),FDefaultDelegateUserPolicy>::Broadcast() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateSignatureImpl.inl:1079]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff63d00ce12 UnrealEditor-Cmd.exe!FEngineLoop::AppPreExit() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:6866]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff63d0136ea UnrealEditor-Cmd.exe!FEngineLoop::Exit() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:5136]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff63d01583b UnrealEditor-Cmd.exe!GuardedMain() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:202]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff63d01589a UnrealEditor-Cmd.exe!GuardedMainWrapper() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:123]
PackagingResults: Error: begin: stack for UAT
PackagingResults: Error: === Critical error: ===
PackagingResults: Error: Fatal error!
PackagingResults: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xffffffffffffffff
PackagingResults: Error: [Callstack] 0x00007ffef29d963a UnrealEditor-CoreUObject.dll!UE::CoreUObject::Private::ResolveObjectHandle() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Public\UObject\ObjectHandle.h:229]
PackagingResults: Error: [Callstack] 0x00007ffef2e087bb UnrealEditor-CoreUObject.dll!FLinkerPlaceholderObjectImpl::ResolvePlaceholderValues() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderBase.cpp:86]
PackagingResults: Error: [Callstack] 0x00007ffef2e08243 UnrealEditor-CoreUObject.dll!FLinkerPlaceholderObjectImpl::ResolvePlaceholderValues() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderBase.cpp:110]
PackagingResults: Error: [Callstack] 0x00007ffef2e07c9d UnrealEditor-CoreUObject.dll!FLinkerPlaceholderBase::ResolvePlaceholderPropertyValues() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderBase.cpp:586]
PackagingResults: Error: [Callstack] 0x00007ffef2e06d17 UnrealEditor-CoreUObject.dll!FLinkerPlaceholderBase::ResolveAllPlaceholderReferences() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderBase.cpp:506]
PackagingResults: Error: [Callstack] 0x00007ffef2e06841 UnrealEditor-CoreUObject.dll!TLinkerImportPlaceholder::ResolveAllPlaceholderReferences() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderBase.inl:63]
PackagingResults: Error: [Callstack] 0x00007ffef2dd967e UnrealEditor-CoreUObject.dll!ULinkerPlaceholderClass::BeginDestroy() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderClass.cpp:34]
PackagingResults: Error: [Callstack] 0x00007ffef2ddc086 UnrealEditor-CoreUObject.dll!UObject::ConditionalBeginDestroy() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp:1220]
PackagingResults: Error: [Callstack] 0x00007ffef2d1448c UnrealEditor-CoreUObject.dll!UnhashUnreachableObjects() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp:5928]
PackagingResults: Error: [Callstack] 0x00007ffef2c98d44 UnrealEditor-CoreUObject.dll!IncrementalPurgeGarbage() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp:4523]
PackagingResults: Error: [Callstack] 0x00007ffef2cc186c UnrealEditor-CoreUObject.dll!PurgeAllUObjectsOnExit() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp:6120]
PackagingResults: Error: [Callstack] 0x00007ffef2e166c4 UnrealEditor-CoreUObject.dll!StaticExit() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp:5496]
PackagingResults: Error: [Callstack] 0x00007ffef2a4b117 UnrealEditor-CoreUObject.dll!TBaseStaticDelegateInstance<void __cdecl(void),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:779]
PackagingResults: Error: [Callstack] 0x00007ff63d00d6d1 UnrealEditor-Cmd.exe!TMulticastDelegate<void __cdecl(void),FDefaultDelegateUserPolicy>::Broadcast() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateSignatureImpl.inl:1079]
PackagingResults: Error: [Callstack] 0x00007ff63d00ce12 UnrealEditor-Cmd.exe!FEngineLoop::AppPreExit() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:6866]
PackagingResults: Error: [Callstack] 0x00007ff63d0136ea UnrealEditor-Cmd.exe!FEngineLoop::Exit() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:5136]
PackagingResults: Error: [Callstack] 0x00007ff63d01583b UnrealEditor-Cmd.exe!GuardedMain() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:202]
PackagingResults: Error: [Callstack] 0x00007ff63d01589a UnrealEditor-Cmd.exe!GuardedMainWrapper() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:123]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff63d019114 UnrealEditor-Cmd.exe!LaunchWindowsStartup() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:277]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff63d02bd04 UnrealEditor-Cmd.exe!WinMain() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:317]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff63d02e422 UnrealEditor-Cmd.exe!__scrt_common_main_seh() [D:\a_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007fff6041259d KERNEL32.DLL!UnknownFunction
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error: end: stack for UAT
PackagingResults: Error: [Callstack] 0x00007ff63d019114 UnrealEditor-Cmd.exe!LaunchWindowsStartup() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:277]
PackagingResults: Error: [Callstack] 0x00007ff63d02bd04 UnrealEditor-Cmd.exe!WinMain() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:317]
PackagingResults: Error: [Callstack] 0x00007ff63d02e422 UnrealEditor-Cmd.exe!__scrt_common_main_seh() [D:\a_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
PackagingResults: Error: [Callstack] 0x00007fff6041259d KERNEL32.DLL!UnknownFunction
PackagingResults: Error: end: stack for UAT
UATHelper: Packaging (Windows): Took 31,31s to run UnrealEditor-Cmd.exe, ExitCode=3
UATHelper: Packaging (Windows): Cook failed.
UATHelper: Packaging (Windows): (see E:\Users\Psychojau\AppData\Roaming\Unreal Engine\AutomationTool\Logs\F+UnrealWin+UE_5.5\Log.txt for full exception trace)
UATHelper: Packaging (Windows): AutomationTool executed for 0h 0m 33s
UATHelper: Packaging (Windows): AutomationTool exiting with ExitCode=25 (Error_UnknownCookFailure)
UATHelper: Packaging (Windows): BUILD FAILED
LogStreaming: Display: FlushAsyncLoading(339): 1 QueuedPackages, 0 AsyncPackages
PackagingResults: Error: Unknown Cook Failure
Exit Crash 1
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000006500000295
UnrealEditor_CoreUObject!UE::CoreUObject::Private::ResolveObjectHandle() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Public\UObject\ObjectHandle.h:229]
UnrealEditor_CoreUObject!FLinkerPlaceholderObjectImpl::ResolvePlaceholderValues() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderBase.cpp:86]
UnrealEditor_CoreUObject!FLinkerPlaceholderObjectImpl::ResolvePlaceholderValues() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderBase.cpp:110]
UnrealEditor_CoreUObject!FLinkerPlaceholderBase::ResolvePlaceholderPropertyValues() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderBase.cpp:586]
UnrealEditor_CoreUObject!FLinkerPlaceholderBase::ResolveAllPlaceholderReferences() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderBase.cpp:506]
UnrealEditor_CoreUObject!TLinkerImportPlaceholder::ResolveAllPlaceholderReferences() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderBase.inl:63]
UnrealEditor_CoreUObject!ULinkerPlaceholderClass::BeginDestroy() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerPlaceholderClass.cpp:34]
UnrealEditor_CoreUObject!UObject::ConditionalBeginDestroy() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp:1220]
UnrealEditor_CoreUObject!UnhashUnreachableObjects() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp:5928]
UnrealEditor_CoreUObject!IncrementalPurgeGarbage() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp:4523]
UnrealEditor_CoreUObject!PurgeAllUObjectsOnExit() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollection.cpp:6120]
UnrealEditor_CoreUObject!StaticExit() [D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp:5496]
UnrealEditor_CoreUObject!TBaseStaticDelegateInstance<void __cdecl(void),FDefaultDelegateUserPolicy>::ExecuteIfSafe() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:779]
UnrealEditor!TMulticastDelegate<void __cdecl(void),FDefaultDelegateUserPolicy>::Broadcast() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateSignatureImpl.inl:1079]
UnrealEditor!FEngineLoop::AppPreExit() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:6866]
UnrealEditor!FEngineLoop::Exit() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:5136]
UnrealEditor!GuardedMain() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:202]
UnrealEditor!GuardedMainWrapper() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:123]
UnrealEditor!LaunchWindowsStartup() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:277]
UnrealEditor!WinMain() [D:\build++UE5\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:317]
UnrealEditor!__scrt_common_main_seh() [D:\a_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
kernel32
ntdll
Exit Crash 2
Fatal error: [File:D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\Serialization\AsyncPackageLoader.cpp] [Line: 627]
Requesting async load of “/Script/InputCore” when async loading is not allowed (after shutdown). Please fix higher level code.