Thanks for the advice, but it didn’t work.
I verified the engine and retried on my existing project, which gave me the same error in the screenshot. I then created a new Third person cpp template project and ran the executable immediately, but the engine still gave me the same error.
Is there any other thing that I can try?
Also, here is the full error in the output log(from a fresh third person template). I found the attributetypes.h file but couldn’t figure out much on my own…
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: begin: stack for UAT
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: === Critical error: ===
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error:
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: Assertion failed: Index != INDEX_NONE [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Engine\Public\Animation\AttributeTypes.h] [Line: 117]
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: Missing operator for attribute, type IntegerAnimationAttribute was not registered previously
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error:
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error:
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff65be01ade MyProject.exe!UE::Anim::AttributeTypes::GetTypeOperator() []
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff65be13390 MyProject.exe!FAttributeCurve::Serialize() []
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff657b8bb2d MyProject.exe!UScriptStruct::SerializeItem() []
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff657d00b16 MyProject.exe!FStructProperty::SerializeItem() []
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff657cfe6bf MyProject.exe!FMapProperty::SerializeItem() []
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff657b8c558 MyProject.exe!SerializeUnversionedProperties() []
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff657c8d182 MyProject.exe!UObject::SerializeScriptProperties() []
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff657c8ceb1 MyProject.exe!UObject::Serialize() []
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff657c8cd20 MyProject.exe!UObject::Serialize() []
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff65be62a4e MyProject.exe!UAnimationAsset::Serialize() []
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff65bf7b264 MyProject.exe!UAnimSequenceBase::Serialize() []
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff65bf3948b MyProject.exe!UAnimSequence::Serialize() []
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff657a8d93e MyProject.exe!FAsyncPackage::EventDrivenSerializeExport() []
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff657ab96d3 MyProject.exe!FAsyncPackage::ProcessImportsAndExports_Event() []
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff657a68e48 MyProject.exe!<lambda_419ae4a50964c9ecc819ffdf467ae837>::operator()() []
LogPlayLevel: Error: [2022.05.17-12.18.27:993][ 0]LogWindows: Error: [Callstack] 0x00007ff657ab674c MyProject.exe!FAsyncLoadingThread::ProcessAsyncLoading() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff657adc478 MyProject.exe!FAsyncLoadingThread::TickAsyncThread() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff657ad986d MyProject.exe!FAsyncLoadingThread::TickAsyncLoading() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff657aa1217 MyProject.exe!FAsyncLoadingThread::FlushLoading() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff657afccef MyProject.exe!FlushAsyncLoading() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff657d93b69 MyProject.exe!LoadPackageInternal() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff657d93634 MyProject.exe!LoadPackage() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff657daa008 MyProject.exe!ResolveName() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff657db5ab0 MyProject.exe!StaticLoadObjectInternal() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff657db4fb2 MyProject.exe!StaticLoadObject() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff657db4930 MyProject.exe!StaticLoadClass() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff65731e129 MyProject.exe!ConstructorHelpersInternal::FindOrLoadClass() [C:\Program Files\Epic Games\UE_5.0\Engine\Source\Runtime\CoreUObject\Public\UObject\ConstructorHelpers.h:87]
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff65731dc9e MyProject.exe!AMyProjectGameMode::AMyProjectGameMode() [F:\Projects\Unreal\MyProject\Source\MyProject\MyProjectGameMode.cpp:10]
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff657b356e3 MyProject.exe!UClass::CreateDefaultObject() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff657db9912 MyProject.exe!UObjectInitialized() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff657d9aa5a MyProject.exe!ProcessNewlyLoadedUObjects() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff655fa76ca MyProject.exe!FEngineLoop::PreInitPostStartupScreen() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff655fa0b9c MyProject.exe!GuardedMain() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff655fa0eda MyProject.exe!GuardedMainWrapper() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff655fa3f5c MyProject.exe!LaunchWindowsStartup() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff655fb5704 MyProject.exe!WinMain() []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ff65e01a28a MyProject.exe!__scrt_common_main_seh() [d:\a01\_work\12\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ffefdfe7034 KERNEL32.DLL!UnknownFunction []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: [Callstack] 0x00007ffeff122651 ntdll.dll!UnknownFunction []
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error:
LogPlayLevel: Error: [2022.05.17-12.18.27:994][ 0]LogWindows: Error: end: stack for UAT
LogPlayLevel: Error: ERROR: Client exited with error code: 3