Crash on launching (93%) Project Assertion failed

Hi!

As i’m launching my project which worked fine yesterday it now just crashes as it’s loaded to 93%. Below is my Crash logg and i can’t figure out what is wrong. I have verifyed the engine (4.16.3). Any clue as to what is causing this ? (Blueprint only project)

Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\core\public\Containers/Array.h] [Line: 633]
Array index out of bounds: 0 from an array of size 0

UE4Editor_Core!FDebug::AssertFailed() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:349]
UE4Editor_CoreUObject!FLinkerPlaceholderObjectImpl::FindRawPlaceholderContainer() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerplaceholderbase.cpp:161]
UE4Editor_CoreUObject!FLinkerPlaceholderBase::AddReferencingPropertyValue() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerplaceholderbase.cpp:367]
UE4Editor_CoreUObject!UObjectProperty::SerializeItem() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\propertyobject.cpp:83]
UE4Editor_CoreUObject!FPropertyTag::SerializeTaggedProperty() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\propertytag.cpp:185]
UE4Editor_CoreUObject!UStruct::SerializeTaggedProperties() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:1069]
UE4Editor_Engine!UUserDefinedStruct::SerializeTaggedProperties() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\engine\private\userdefinedstruct.cpp:231]
UE4Editor_CoreUObject!UScriptStruct::SerializeItem() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:2002]
UE4Editor_CoreUObject!UStructProperty::SerializeItem() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\propertystruct.cpp:119]
UE4Editor_CoreUObject!FPropertyTag::SerializeTaggedProperty() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\propertytag.cpp:185]
UE4Editor_CoreUObject!UStruct::SerializeTaggedProperties() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\class.cpp:1069]
UE4Editor_CoreUObject!UObject::SerializeScriptProperties() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\obj.cpp:1239]
UE4Editor_CoreUObject!UObject::Serialize() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\obj.cpp:1173]
UE4Editor_Engine!UEngine::CopyPropertiesForUnrelatedObjects() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\engine\private\unrealengine.cpp:11699]
UE4Editor_KismetCompiler!FKismetCompilerContext::CompileFunctions() [d:\build++ue4+release-4.16+compile\sync\engine\source\editor\kismetcompiler\private\kismetcompiler.cpp:3952]
UE4Editor_KismetCompiler!FKismet2CompilerModule::CompileBlueprintInner() [d:\build++ue4+release-4.16+compile\sync\engine\source\editor\kismetcompiler\private\kismetcompilermodule.cpp:131]
UE4Editor_KismetCompiler!FKismet2CompilerModule::CompileBlueprint() [d:\build++ue4+release-4.16+compile\sync\engine\source\editor\kismetcompiler\private\kismetcompilermodule.cpp:247]
UE4Editor_UnrealEd!FKismetEditorUtilities::RecompileBlueprintBytecode() [d:\build++ue4+release-4.16+compile\sync\engine\source\editor\unrealed\private\kismet2\kismet2.cpp:1024]
UE4Editor_Engine!UBlueprintGeneratedClass::ConditionalRecompileClass() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\engine\private\blueprintgeneratedclass.cpp:295]
UE4Editor_CoreUObject!::operator()() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\blueprint\blueprintsupport.cpp:345]
UE4Editor_CoreUObject!FScopedClassDependencyGather::~FScopedClassDependencyGather() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\blueprint\blueprintsupport.cpp:363]
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3950]
UE4Editor_CoreUObject!FLinkerLoad::IndexToObject() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4166]
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3639]
UE4Editor_CoreUObject!FLinkerLoad::CreateExportAndPreload() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2683]
UE4Editor_CoreUObject!FLinkerLoad::LoadAllObjects() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2830]
UE4Editor_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1280]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2360]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2127]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2408]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2127]
UE4Editor_CoreUObject!FLinkerLoad::Verify() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1906]
UE4Editor_CoreUObject!FLinkerLoad::FinalizeCreation() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1816]
UE4Editor_CoreUObject!FLinkerLoad::Tick() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:730]
UE4Editor_CoreUObject!FLinkerLoad::CreateLinker() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:437]
UE4Editor_CoreUObject!GetPackageLinker() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linker.cpp:688]
UE4Editor_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1208]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2360]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2127]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2408]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2127]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2408]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2127]
UE4Editor_CoreUObject!FLinkerLoad::Verify() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1906]
UE4Editor_CoreUObject!FLinkerLoad::FinalizeCreation() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1816]
UE4Editor_CoreUObject!FLinkerLoad::Tick() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:730]
UE4Editor_CoreUObject!FLinkerLoad::CreateLinker() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:437]
UE4Editor_CoreUObject!GetPackageLinker() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linker.cpp:688]
UE4Editor_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1208]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2360]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2127]
UE4Editor_CoreUObject!FLinkerLoad::Verify() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1906]
UE4Editor_CoreUObject!FLinkerLoad::FinalizeCreation() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1816]
UE4Editor_CoreUObject!FLinkerLoad::Tick() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:730]
UE4Editor_CoreUObject!FLinkerLoad::CreateLinker() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:437]
UE4Editor_CoreUObject!GetPackageLinker() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linker.cpp:688]
UE4Editor_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1208]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2360]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2127]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2408]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2127]
UE4Editor_CoreUObject!FLinkerLoad::Verify() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1906]
UE4Editor_CoreUObject!FLinkerLoad::FinalizeCreation() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:1816]
UE4Editor_CoreUObject!FLinkerLoad::Tick() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:730]
UE4Editor_CoreUObject!FLinkerLoad::CreateLinker() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:437]
UE4Editor_CoreUObject!GetPackageLinker() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\linker.cpp:688]
UE4Editor_CoreUObject!LoadPackageInternal() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1208]
UE4Editor_CoreUObject!LoadPackage() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1377]
UE4Editor_UnrealEd!UEditorEngine::Map_Load() [d:\build++ue4+release-4.16+compile\sync\engine\source\editor\unrealed\private\editorserver.cpp:2534]
UE4Editor_UnrealEd!UEditorEngine::HandleMapCommand() [d:\build++ue4+release-4.16+compile\sync\engine\source\editor\unrealed\private\editorserver.cpp:6120]
UE4Editor_UnrealEd!UEditorEngine::Exec() [d:\build++ue4+release-4.16+compile\sync\engine\source\editor\unrealed\private\editorserver.cpp:5597]
UE4Editor_UnrealEd!UUnrealEdEngine::Exec() [d:\build++ue4+release-4.16+compile\sync\engine\source\editor\unrealed\private\unrealedsrv.cpp:670]
UE4Editor_UnrealEd!FEditorFileUtils::LoadMap() [d:\build++ue4+release-4.16+compile\sync\engine\source\editor\unrealed\private\filehelpers.cpp:2259]
UE4Editor_UnrealEd!FEditorFileUtils::LoadDefaultMapAtStartup() [d:\build++ue4+release-4.16+compile\sync\engine\source\editor\unrealed\private\filehelpers.cpp:3575]
UE4Editor_UnrealEd!FUnrealEdMisc::OnInit() [d:\build++ue4+release-4.16+compile\sync\engine\source\editor\unrealed\private\unrealedmisc.cpp:346]
UE4Editor_UnrealEd!EditorInit() [d:\build++ue4+release-4.16+compile\sync\engine\source\editor\unrealed\private\unrealedglobals.cpp:97]
UE4Editor!GuardedMain() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\launch\private\launch.cpp:150]
UE4Editor!GuardedMainWrapper() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:134]
UE4Editor!WinMain() [d:\build++ue4+release-4.16+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253]
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