LNK1120:2 Unresolved externals

Hi all

I have problems with compiling the c++ for my Project.

The log:
Running C:/Program Files (x86)/Epic Games/4.12/Engine/Binaries/DotNET/UnrealBuildTool.exe MyProject1 Development Win64 -project=“T:/UnrealProjects/MyProject1/MyProject1.uproject” -editorrecompile -progress -noubtmakefiles -NoHotReloadFromIDE
@progress push 5%
Parsing headers for MyProject1Editor
Running UnrealHeaderTool “T:\UnrealProjects\MyProject1\MyProject1.uproject” “T:\UnrealProjects\MyProject1\Intermediate\Build\Win64\MyProject1Editor\Development\MyProject1Editor.uhtmanifest” -LogCmds=“loginit warning, logexit warning, logdatabase error” -Unattended -WarningsAsErrors -installed
Reflection code generated for MyProject1Editor in 5,8770597 seconds
@progress pop
Performing 7 actions (2 in parallel)
[2/7] Resource PCLaunch.rc
PCH.MyProject1.h.cpp
[3/7] Resource ModuleVersionResource.rc.inl
MyProject1.generated.cpp
MyProject1GameMode.cpp
MyProject1.cpp
[7/7] Link UE4Editor-MyProject1.dll
Creating library T:\UnrealProjects\MyProject1\Intermediate\Build\Win64\UE4Editor\Development\UE4Editor-MyProject1.lib and object T:\UnrealProjects\MyProject1\Intermediate\Build\Win64\UE4Editor\Development\UE4Editor-MyProject1.exp
MyProject1.cpp.obj : error LNK2019: unresolved external symbol “__declspec(dllimport) public: static class TBaseDelegate & __cdecl FCoreDelegates::GetObjectArrayForDebugVisualizersDelegate(void)” (_imp?GetObjectArrayForDebugVisualizersDelegate@FCoreDelegates@@SAAEAV?$TBaseDelegate@PEAVFFixedUObjectArray@■■■$V@@anonymous_user_9674a66c) referenced in function “void __cdecl `dynamic initializer for ‘GObjectArrayForDebugVisualizers’'(void)” (??__EGObjectArrayForDebugVisualizers@@YAXXZ)
MyProject1GameMode.cpp.obj : error LNK2001: unresolved external symbol “public: virtual bool __cdecl AGameMode::SetPause(class APlayerController *,class TBaseDelegate)” (?SetPause@AGameMode@@UEAA_NPEAVAPlayerController@@anonymous_user_e71e0d8a1?$TBaseDelegate@_N$$$V@@@Z)
MyProject1.generated.cpp.obj : error LNK2001: unresolved external symbol “public: virtual bool __cdecl AGameMode::SetPause(class APlayerController *,class TBaseDelegate)” (?SetPause@AGameMode@@UEAA_NPEAVAPlayerController@@anonymous_user_e71e0d8a1?$TBaseDelegate@_N$$$V@@@Z)
T:\UnrealProjects\MyProject1\Binaries\Win64\UE4Editor-MyProject1.dll : fatal error LNK1120: 2 unresolved externals
ERROR: UBT ERROR: Failed to produce item: T:\UnrealProjects\MyProject1\Binaries\Win64\UE4Editor-MyProject1.dll
Total build time: 94,08 seconds