Crashes when i launch the game

Here is the report, sorry i cant figure out how to make it a spoiler os something of that sort.

MachineId:
EpicAccountId:

Assertion failed: IsValidIndex(Index) && ChunkIndex < NumChunks && Index < MaxTotalElements [File:d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\public\UObject/NameTypes.h] [Line: 349] 



UE4Editor_Core!FDebug::AssertFailed() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:332]
UE4Editor_Core!FName::GetDisplayNameEntry() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\uobject\unrealnames.cpp:874]
UE4Editor_Core!FName::ToString() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\core\private\uobject\unrealnames.cpp:880]
UE4Editor_UnrealEd!UCookOnTheFlyServer::Cache() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\cookontheflyserver.cpp:672]
UE4Editor_UnrealEd!UCookOnTheFlyServer::TickCookOnTheSide() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\cookontheflyserver.cpp:2090]
UE4Editor_UnrealEd!UCookOnTheFlyServer::Tick() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\cookontheflyserver.cpp:770]
UE4Editor_UnrealEd!FTickableEditorObject::TickObjects() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\public\tickableeditorobject.h:17]
UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:1195]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [d:\build\++ue4+release-4.14+compile\sync\engine\source\editor\unrealed\private\unrealedengine.cpp:371]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2859]
UE4Editor!GuardedMain() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\launch.cpp:152]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\build\++ue4+release-4.14+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
kernel32
ntdll

Hi help101boy,

Please review the following link: HOW TO REPORT A BUG -It is of particular importance that you describe in as much detail as possible the events leading up to the bug as well as that you hit the submit button in the Crash Reporter window so that we can locate your crash and compare it with crashes from other users experiencing the same crash.

After reviewing the linked documentation above, please post as much of the requested information as possible and we will continue to investigate this issue.

.