There is an error after opening the level. I’ve already tried several different versions of un4
Assertion failed: IsValidIndex(Index) && ChunkIndex < NumChunks && Index < MaxTotalElements [File:D:\Build++UE4+Release-4.15+Compile\Sync\Engine\Source\Runtime\Core\Public\UObject/NameTypes.h] [Line: 354]
UE4Editor_Core!FDebug::AssertFailed() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:349]
UE4Editor_Core!FName::GetDisplayNameEntry() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\uobject\unrealnames.cpp:895]
UE4Editor_Core!FName::ToString() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\uobject\unrealnames.cpp:901]
UE4Editor_CoreUObject!UObjectBaseUtility::GetName() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\coreuobject\public\uobject\uobjectbaseutility.h:349]
UE4Editor_Engine!FAudioDevice::RecursiveApplyAdjuster() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\audiodevice.cpp:1580]
UE4Editor_Engine!FAudioDevice::ApplyClassAdjusters() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\audiodevice.cpp:1985]
UE4Editor_Engine!FAudioDevice::UpdateSoundClassProperties() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\audiodevice.cpp:2076]
UE4Editor_Engine!FAudioDevice::Update() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\audiodevice.cpp:3024]
UE4Editor_Engine!TGraphTask::ExecuteTask() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\core\public\async\taskgraphinterfaces.h:883]
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:954]
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:701]
UE4Editor_Engine!FAudioThread::Run() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\audiothread.cpp:154]
UE4Editor_Core!FRunnableThreadWin::Run() [d:\build++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:76]