Error in Lyra Sample Project - UE 5.2

Development Programming & Scripting
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1 
0>Module.LyraGame.1_of_3.cpp.obj: Error LNK2001 : unresolved external symbol "protected: virtual void __cdecl UE::Net::FNetSerializerRegistryDelegates::OnPostFreezeNetSerializerRegistry(void)" (?OnPostFreezeNetSerializerRegistry@FNetSerializerRegistryDelegates@Net@UE@@MEAAXXZ)
0>Module.LyraGame.1_of_3.cpp.obj: Error LNK2019 : unresolved external symbol "__declspec(dllimport) public: virtual __cdecl FNetSerializerConfig::~FNetSerializerConfig(void)" (__imp_??1FNetSerializerConfig@@UEAA@XZ) referenced in function "public: virtual void * __cdecl FNetSerializerConfig::`scalar deleting destructor'(unsigned int)" (??_GFNetSerializerConfig@@UEAAPEAXI@Z)
0>Module.LyraGame.1_of_3.cpp.obj: Error LNK2019 : unresolved external symbol "__declspec(dllimport) public: __cdecl UE::Net::FNetSerializerRegistryDelegates::FNetSerializerRegistryDelegates(void)" (__imp_??0FNetSerializerRegistryDelegates@Net@UE@@QEAA@XZ) referenced in function "void __cdecl UE::Net::`dynamic initializer for 'LyraGameplayEffectContextNetSerializerRegistryDelegates''(void)" (??__ELyraGameplayEffectContextNetSerializerRegistryDelegates@Net@UE@@YAXXZ)
0>Module.LyraGame.1_of_3.cpp.obj: Error LNK2019 : unresolved external symbol "__declspec(dllimport) public: virtual __cdecl UE::Net::FNetSerializerRegistryDelegates::~FNetSerializerRegistryDelegates(void)" (__imp_??1FNetSerializerRegistryDelegates@Net@UE@@UEAA@XZ) referenced in function "public: virtual void * __cdecl UE::Net::FLyraGameplayEffectContextNetSerializerRegistryDelegates::`scalar deleting destructor'(unsigned int)" (??_GFLyraGameplayEffectContextNetSerializerRegistryDelegates@Net@UE@@UEAAPEAXI@Z)
0>Module.LyraGame.1_of_3.cpp.obj: Error LNK2019 : unresolved external symbol "__declspec(dllimport) public: static void __cdecl UE::Net::FPropertyNetSerializerInfoRegistry::Register(struct UE::Net::FPropertyNetSerializerInfo const *)" (__imp_?Register@FPropertyNetSerializerInfoRegistry@Net@UE@@SAXPEBUFPropertyNetSerializerInfo@23@@Z) referenced in function "public: virtual void __cdecl UE::Net::FLyraGameplayEffectContextNetSerializerRegistryDelegates::OnPreFreezeNetSerializerRegistry(void)" (?OnPreFreezeNetSerializerRegistry@FLyraGameplayEffectContextNetSerializerRegistryDelegates@Net@UE@@UEAAXXZ)
0>Module.LyraGame.1_of_3.cpp.obj: Error LNK2019 : unresolved external symbol "__declspec(dllimport) public: static void __cdecl UE::Net::FPropertyNetSerializerInfoRegistry::Unregister(struct UE::Net::FPropertyNetSerializerInfo const *)" (__imp_?Unregister@FPropertyNetSerializerInfoRegistry@Net@UE@@SAXPEBUFPropertyNetSerializerInfo@23@@Z) referenced in function "public: virtual void * __cdecl UE::Net::FLyraGameplayEffectContextNetSerializerRegistryDelegates::`scalar deleting destructor'(unsigned int)" (??_GFLyraGameplayEffectContextNetSerializerRegistryDelegates@Net@UE@@UEAAPEAXI@Z)
0>  Hint on symbols that are defined and could potentially match:
0>    "__declspec(dllimport) public: void __cdecl FUIExtensionHandle::Unregister(void)" (__imp_?Unregister@FUIExtensionHandle@@QEAAXXZ)
0>Module.LyraGame.2_of_3.cpp.obj: Error LNK2019 : unresolved external symbol "__declspec(dllimport) public: static unsigned int __cdecl UE::Net::FReplicationFragmentUtil::CreateAndRegisterFragmentsForObject(class UObject *,class UE::Net::FFragmentRegistrationContext &,enum UE::Net::EFragmentRegistrationFlags,class TArray<class UE::Net::FReplicationFragment *,class TSizedDefaultAllocator<32> > *)" (__imp_?CreateAndRegisterFragmentsForObject@FReplicationFragmentUtil@Net@UE@@SAIPEAVUObject@@AEAVFFragmentRegistrationContext@23@W4EFragmentRegistrationFlags@23@PEAV?$TArray@PEAVFReplicationFragment@Net@UE@@V?$TSizedDefaultAllocator@$0CA@@@@@@Z) referenced in function "protected: virtual void __cdecl ULyraEquipmentInstance::RegisterReplicationFragments(class UE::Net::FFragmentRegistrationContext &,enum UE::Net::EFragmentRegistrationFlags)" (?RegisterReplicationFragments@ULyraEquipmentInstance@@MEAAXAEAVFFragmentRegistrationContext@Net@UE@@W4EFragmentRegistrationFlags@34@@Z)
0>D:\GameDevelopment\UnrealProjects\MercenaryChronicles\Binaries\Win64\UnrealEditor-LyraGame.dll: Error LNK1120 : 7 unresolved externals

I am gaetting the above Link2001 and 2019 errors, how can I resolve them, I have been trying to locate them but no success.

2

If you like to use the Lyra project for UE 5.2 preview 2 then get it from the source build
Please do not forget to copy the content folder from the 5.1 Lyra Starter Game

3

When porting a 5.1 Lyra project to 5.2, I was able to fix these linker errors by adding these two lines near the end of LyraGame.build.cs

		SetupGameplayDebuggerSupport(Target);
		SetupIrisSupport(Target);

https://github.com/EpicGames/UnrealEngine/blob/a416715ec338d534ad13abc290544a801ef1381e/Samples/Games/Lyra/Source/LyraGame/LyraGame.Build.cs#L86

This is part of Iris support and is mentioned in the upgrade notes:

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