Creating c++ new class

Successfully added class ‘name’, however you must recompile the ‘Skysphere’ module before it will appear in the Content Browser. Failed to automatically hot reload the ‘Skysphere’ module.

Would you like to open the Output Log to see more details?

CompilerResultsLog: Info Creating library C:\Unreal Engine\Skysphere\Intermediate\Build\Win64\UE4Editor\Development\UE4Editor-Skysphere-9902.lib and object C:\Unreal Engine\Skysphere\Intermediate\Build\Win64\UE4Editor\Development\UE4Editor-Skysphere-9902.exp
CompilerResultsLog:Error: Error Skysphere_material.cpp.obj : error LNK2019: unresolved external symbol “__declspec(dllimport) public: __cdecl FRenderCommandFence::~FRenderCommandFence(void)” (_imp??1FRenderCommandFence@@QEAA@XZ) referenced in function “public: virtual __cdecl UMaterialInstance::~UMaterialInstance(void)” (??1UMaterialInstance@@UEAA@XZ)
CompilerResultsLog:Error: Error Skysphere.generated.cpp.obj : error LNK2001: unresolved external symbol “__declspec(dllimport) public: __cdecl FRenderCommandFence::~FRenderCommandFence(void)” (_imp??1FRenderCommandFence@@QEAA@XZ)
CompilerResultsLog:Error: Error C:\Unreal Engine\Skysphere\Binaries\Win64\UE4Editor-Skysphere-9902.dll : fatal error LNK1120: 1 unresolved externals
CompilerResultsLog: Info -------- End Detailed Actions Stats -----------------------------------------------------------
CompilerResultsLog: Info ERROR: UBT ERROR: Failed to produce item: C:\Unreal Engine\Skysphere\Binaries\Win64\UE4Editor-Skysphere-9902.dll

It’s a blank project.