Why do I use an error on my MOD?I only use three default files

I copy the GenericMod, PrimalGameData_BP_GenericMod, TestGameMode_GenericMod files from the GenericMod directory to my MOD directory and change the file names to MyArkMod, PrimalGameData_BP_MyArkMod, and TestGameMode_MyArkMod.Then I upload MOD, and finally use the local game
Are in accordance with the tutorial to operate, but prompted the error, is it because my version of the development kit out of date? Last week I downloaded the development kit, or other reasons?

The following is an error message:

Fatal error!

VERSION: 252.2
ShooterGame.exe!FArchiveProxy::TotalSize() (0x00007ff6a2d17284) + 4 bytes [c:\svn_ark\engine\source\runtime\core\public\serialization\archivebase.h:1127]
ShooterGame.exe!ASupplyCrateSpawningVolume::CheckForSupplyCrateStart() (0x00007ff6a2714b26) + 28 bytes [c:\svn_ark\projects\shootergame\source\shootergame\private\supplycratespawningvolume.cpp:72]
ShooterGame.exe!ASupplyCrateSpawningVolume::BeginPlay() (0x00007ff6a27149de) + 0 bytes [c:\svn_ark\projects\shootergame\source\shootergame\private\supplycratespawningvolume.cpp:66]
ShooterGame.exe!ULevel::RouteActorInitialize() (0x00007ff6a358f1c1) + 0 bytes [c:\svn_ark\engine\source\runtime\engine\private\level.cpp:1721]
ShooterGame.exe!UWorld::AddToWorld() (0x00007ff6a379526c) + 0 bytes [c:\svn_ark\engine\source\runtime\engine\private\world.cpp:1850]
ShooterGame.exe!UWorld::UpdateLevelStreamingInner() (0x00007ff6a37982f1) + 0 bytes [c:\svn_ark\engine\source\runtime\engine\private\world.cpp:2490]
ShooterGame.exe!UWorld::UpdateLevelStreaming() (0x00007ff6a3798609) + 0 bytes [c:\svn_ark\engine\source\runtime\engine\private\world.cpp:2573]
ShooterGame.exe!UGameViewportClient::Draw() (0x00007ff6a34ed4f8) + 0 bytes [c:\svn_ark\engine\source\runtime\engine\private\gameviewportclient.cpp:879]
ShooterGame.exe!FViewport::Draw() (0x00007ff6a375a8ea) + 0 bytes [c:\svn_ark\engine\source\runtime\engine\private\unrealclient.cpp:1082]
ShooterGame.exe!UGameEngine::RedrawViewports() (0x00007ff6a34c3dc1) + 0 bytes [c:\svn_ark\engine\source\runtime\engine\private\gameengine.cpp:570]
ShooterGame.exe!UEngine::LoadMap() (0x00007ff6a37739ce) + 0 bytes [c:\svn_ark\engine\source\runtime\engine\private\unrealengine.cpp:9649]
ShooterGame.exe!UEngine::Browse() (0x00007ff6a376e502) + 38 bytes [c:\svn_ark\engine\source\runtime\engine\private\unrealengine.cpp:8335]
ShooterGame.exe!UEngine::TickWorldTravel() (0x00007ff6a376f1c0) + 68 bytes [c:\svn_ark\engine\source\runtime\engine\private\unrealengine.cpp:8507]
ShooterGame.exe!UGameEngine::Tick() (0x00007ff6a34c5b2f) + 0 bytes [c:\svn_ark\engine\source\runtime\engine\private\gameengine.cpp:1116]
ShooterGame.exe!FEngineLoop::Tick() (0x00007ff6a230b350) + 0 bytes [c:\svn_ark\engine\source\runtime\launch\private\launchengineloop.cpp:2376]
ShooterGame.exe!GuardedMain() (0x00007ff6a230585c) + 0 bytes [c:\svn_ark\engine\source\runtime\launch\private\launch.cpp:140]
ShooterGame.exe!GuardedMainWrapper() (0x00007ff6a230c83a) + 5 bytes [c:\svn_ark\engine\source\runtime\launch\private\windows\launchwindows.cpp:125]
ShooterGame.exe!WinMain() (0x00007ff6a230c968) + 8 bytes [c:\svn_ark\engine\source\runtime\launch\private\windows\launchwindows.cpp:209]
ShooterGame.exe!__tmainCRTStartup() (0x00007ff6a46d87b1) + 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]
KERNEL32.DLL!UnknownFunction (0x00007ffa3f0e8364) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffa414d5e91) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffa414d5e91) + 0 bytes [UnknownFile:0]

E3_Far_WIp loading time each time there is an error

The problem is solved! I did not set the correct game mode!:slight_smile: