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Errors when Declaring TAssetPtr

I am trying to declare a UWorld property so that I can setup a Level asset selector, but when I try to declare the UWorld property like below I get errors:

 UPROPERTY(EditAnywhere, BlueprintReadOnly)
         TAssetPtr<UWorld> WorldTest;

The full h is here:

 #pragma once
 #include "Internationalization/Text.h"
 #include "UObject/Object.h"
 #include "UObject/ObjectMacros.h"
 #include "BatchAsset.generated.h"
 UCLASS(BlueprintType, hidecategories=(Object))
 class BATCHASSET_API UBatchAsset : public UObject
     UPROPERTY(EditAnywhere, BlueprintReadOnly)
         TAssetPtr<UWorld> WorldTest;

The error in the output log is as follows:

 Creating library E:\Github\BatchRendering\BatchProject\Plugins\BatchRender\Intermediate\Build\Win64\UE4Editor\Development\BatchAsset\UE4Editor-BatchAsset.suppressed.lib and object E:\Github\BatchRendering\BatchProject\Plugins\BatchRender\Intermediate\Build\Win64\UE4Editor\Development\BatchAsset\UE4Editor-BatchAsset.suppressed.exp
 1>Module.BatchAsset.gen.cpp.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) class UClass * __cdecl Z_Construct_UClass_UWorld_NoRegister(void)" (__imp_?Z_Construct_UClass_UWorld_NoRegister@@YAPEAVUClass@@XZ) referenced in function "void __cdecl `dynamic initializer for 'public: static struct UE4CodeGen_Private::FObjectPropertyParams const Z_Construct_UClass_UBatchAsset_Statics::NewProp_WorldTest''(void)" (??__E?NewProp_WorldTest@Z_Construct_UClass_UBatchAsset_Statics@@2UFObjectPropertyParams@UE4CodeGen_Private@@B@@YAXXZ)
 1>E:\Github\BatchRendering\BatchProject\Plugins\BatchRender\Binaries\Win64\UE4Editor-BatchAsset.dll : fatal error LNK1120: 1 unresolved externals

I'm not even up to trying to set the UWorld parameter in the Slate Widget cause I can't get this to declare the variable in the asset.

Product Version: UE 4.21
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asked Mar 07 '19 at 05:11 PM in C++ Programming

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