The UE4-ShooterGame Game has crashed and will close
Assertion failed: Actuallndex >= 0 [File:F:\build\Lostlsland\Engine\Source\Runtime\CoreUObject\Private\UObject\World SerializedObject.cpp] [Line: 128]

VERSION: 358.6
KERNELBASE.dll! Unknown Function (0x00007ffd9d3e536c) + 0 bytes [UnknownFile:0]
ShooterGame.exe!FOutput Device::Logf__VA0) (0x00007ff640f5f1e8) + 159 bytes [f:\build\lostisland\engine\source\runtime\core\private\misc\output device.cpp:145]
ShooterGame.exe!FDebug::AssertFailed() (0x00007ff640f4c018) + 117 bytes [f:\build\lostisland\engine\source\runtime\core\private\misc\outputdevice.cpp:220]
ShooterGame.exe!FSaveFileObjectReader::operator<<0 (0x00007ff64101ce3a) + 0 bytes [f:\build\lostisland engine\source\runtime\coreuobject\private\uobject\worldserializedobject.cpp:130]
ShooterGame.exeloperator<<0 (0x00007ff640fb9b5f) + 0 bytes [f:\build\lostisland\engine\source\runtime\coreuobject\public\uobject\propertytag.h:74]
ShooterGame.exe!UStruct::SerializeTagged Properties() (0x00007ff640feb7b2) + 0 bytes [f:\build\lostisland\engine\source\runtime\coreuobject\private\uobject\class.cpp:757]
ShooterGame.exe!UObject::SerializeScript Properties() (0x00007ff64101259f) + 0 bytes [f:\build\lostisland\engine\source\runtime\coreuobject\private\uobject\obj.cpp:1065]
ShooterGame.exe!UObject::Serialize() (0x00007ff641011507) + 0 bytes [f:\build\lostisland\engine\source\runtime\coreuobject\private\uobject\obj.cpp:1023]
ShooterGame.exe!Alnstanced FoliageActor::Serialize() (0x00007ff64175e3ea) + 0 bytes [f:\build\lostisland\engine\source\runtime\engine\private\instancedfoliage.cpp:2503]
ShooterGame.exe!World Serialized Object::SerializeObjectData() (0x00007ff641029ac3) + 0 bytes [f:\build\lostisland\engine\source\runtime\coreuobject\private\uobject\worldserialized object.cpp:703]
ShooterGame.exe!UWorld::LoadFromFile() (0x00007ff6419c31bd) + 0 bytes [f:\build\lostisland engine\source\runtime\engine\private\world.cpp:6892]
ShooterGame.exe!AShooterGameMode::LoadWorld(0) (0x00007ff63fd3c617) + 2606 bytes [f:\build\lostisland\projects\shootergame\source\shootergame\private\shootergamemode.cpp:2754]
ShooterGame.exe!AShooterGameMode::InitGame() (0x00007ff63fced762) 0 bytes [f:\build\lostisland\projects\shootergame\source\shootergame\private\shootergamemode.cpp:1525]
ShooterGame.exe!UWorld::InitializeActorsForPlay() (0x00007ff6419c0708) + 43 bytes [f:\build\lostisland\engine\source\runtime\engine\private\world.cpp:3243]
ShooterGame.exe!UEngine::LoadMap() (0x00007ff6419844ae) + 0 bytes [f:\build\lostisland\engine\source\runtime\engine\private\unrealengine.cpp:10374]
ShooterGame.exe!UEngine::Browse() (0x00007ff641964d81) + 43 bytes [f:\build\lostisland\engine\source\runtime\engine\private\unrealengine.cpp:9028]
ShooterGame.exe!UEngine::TickWorldTravel() (0x00007ff641998bfe) + 60 bytes [f:\build\lostisland\engine\source\runtime\engine\private\unrealengine.cpp:9200]
ShooterGame.exe!UGameEngine::Tick() (0x00007ff6417237b5) + 0 bytes [f:\build\lostisland engine\source\runtime\engine\private\gameengine.cpp:1168]
ShooterGame.exe!FEngineLoop::Tick() (0x00007ff63ef35614) +0 bytes [f:\build\lostisland engine\source\runtime\launch\private\launchengineloop.cpp:2647]
ShooterGame.exe!Guarded Main() (0x00007ff63ef3067c) + 0 bytes [f:\build\lostisland\engine\source\runtime\launch\private\launch.cpp:140]
ShooterGame.exe!Guarded MainWrapper() (0x00007ff63ef306ca) + 5 bytes [f:\build\lostisland\engine\source\runtime\launch\private\windows\launchwindows.cpp:125]
ShooterGame.exe!WinMain() (0x00007ff63ef35f8c) + 17 bytes [f:\build\lostisland\engine\source\runtime\launch\private\windows\launchwindows.cpp:213]
ShooterGame.exe!__tmainCRTStartup() (0x00007ff6427c2305) + 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]
KERNEL32.DLL!Unknown Function (0x00007ffd9f4a26ad) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffd9fbea9f8) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffd9fbea9f8) + 0 bytes [UnknownFile:0]