Access violation - code c0000005 (first/second chance not available)

Hello all.
I am following this tutorial to make a n inventory. Pretty much followed closely (only difference is I am storing the inventory in a Game Instance rather than Character controller.)

I am getting a error and crush when I pick up an PickUpBase object. Report is here:

LoginId:483efdfe41b0c3bf539825b6b2adf55e
EpicAccountId:952fa0caa5f442c5a232d6b209904780

Access violation - code c0000005 (first/second chance not available)

UE4Editor_R7_4749!ASPR7GameState::GetItemDB() [e:\ue4\r7\source\r7\spr7gamestate.cpp:19]
UE4Editor_R7_4749!USPR7GameInstance::AddItemToInventoryByID() [e:\ue4\r7\source\r7\spr7gameinstance.cpp:24]
UE4Editor_R7_4749!APickUpBase::PickedUpByPlayer() [e:\ue4\r7\source\r7\pickupbase.cpp:31]
UE4Editor_R7_4749!AR7Character::PickupItem() [e:\ue4\r7\source\r7\r7character.cpp:247]
UE4Editor_Engine!FInputActionUnifiedDelegate::Execute() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\engine\classes\components\inputcomponent.h:204]
UE4Editor_Engine!UPlayerInput::ProcessInputStack() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\userinterface\playerinput.cpp:1225]
UE4Editor_Engine!APlayerController::ProcessPlayerInput() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\playercontroller.cpp:2478]
UE4Editor_Engine!APlayerController::TickPlayerInput() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\playercontroller.cpp:4229]
UE4Editor_Engine!APlayerController::PlayerTick() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\playercontroller.cpp:2142]
UE4Editor_Engine!APlayerController::TickActor() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\playercontroller.cpp:4323]
UE4Editor_Engine!FActorTickFunction::ExecuteTick() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\actor.cpp:132]
UE4Editor_Engine!FTickFunctionTask::DoTask() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\ticktaskmanager.cpp:273]
UE4Editor_Engine!TGraphTask<FTickFunctionTask>::ExecuteTask() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\core\public\async\taskgraphinterfaces.h:784]
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:651]
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:560]
UE4Editor_Core!FTaskGraphImplementation::WaitUntilTasksComplete() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:1330]
UE4Editor_Engine!FTickTaskSequencer::ReleaseTickGroup() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\ticktaskmanager.cpp:542]
UE4Editor_Engine!FTickTaskManager::RunTickGroup() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\ticktaskmanager.cpp:1454]
UE4Editor_Engine!UWorld::RunTickGroup() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\leveltick.cpp:760]
UE4Editor_Engine!UWorld::Tick() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\engine\private\leveltick.cpp:1408]
UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\build\++ue4+release-4.18+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:1659]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [d:\build\++ue4+release-4.18+compile\sync\engine\source\editor\unrealed\private\unrealedengine.cpp:396]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:3296]
UE4Editor!GuardedMain() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\launch\private\launch.cpp:166]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:134]
UE4Editor!WinMain() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253]
kernel32
ntdll

If I understand correctly the whole error and crash starts from GetItemDB() function in GameState which is just " return ItemDB; " basically returning the database. I checked some questions about “Access violation - code c0000005” and it seems people suggest checking pointers, however it seems to unrelated for this situation. ?
I would really appreciate some help about understanding he crush report here. It has been 2-3 days and I am kinda stuck.
Here are my code files if you wish to look at them.

I am using UE4 4.18.3 and VS 2017 with updates.

Thanks and respects.

Solved:

https://forums.unrealengine.com/development-discussion/c-gameplay-programming/1589303-access-violation-code-c0000005-first-second-chance-not-available