Hi all, so I’m new to posting here but loving the community so far 
So I’ve been following all the steps from all the tutorials for adding code to project. Everything builds fine. That is, until I add my first class using the class wizard.
Scenario:
I create an Actor Class called Pickup. I made it public via the wizard. Pickup.h
The header’s code is as follows:
#pragma once
#include "GameFramework/Actor.h"
#include "Pickup.generated.h"
UCLASS()
class CLAUDIA_API APickup : public AActor
{
GENERATED_UCLASS_BODY()
};
The include shows errors: cannot open source file “Pickup.generated.h”.
And GENERATED_UCLASS_BODY() shows error; expected an identifier.
And the .cpp file is Pickup.cpp
The code for that is as follows:
#include "ClaudiaPrivate.h"
#include "Pickup.h"
APickup::APickup(const class FPostConstructInitializeProperties& PCIP)
: Super(PCIP)
{
}
It has errors too;
No instance of overloaded function “APickup::APickup” matches the specified type e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Projects\Claudia\Source\Claudia\Private\Pickup.cpp ".
Here is the entire error list if it helps.
Error 1 error LNK1104: cannot open file 'E:\Unreal Engine Source Code Original\UnrealEngine-4.4\Projects\Claudia\Binaries\Win64\UE4Editor-Claudia.dll' E:\Unreal Engine Source Code Original\UnrealEngine-4.4\Projects\Claudia\Intermediate\ProjectFiles\LINK Claudia
Error 2 error : Failed to produce item: E:\Unreal Engine Source Code Original\UnrealEngine-4.4\Projects\Claudia\Binaries\Win64\UE4Editor-Claudia.pdb E:\Unreal Engine Source Code Original\UnrealEngine-4.4\Projects\Claudia\Intermediate\ProjectFiles\ERROR Claudia
Error 3 error MSB3073: The command ""E:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Build\BatchFiles\Build.bat" ClaudiaEditor Win64 Development "E:\Unreal Engine Source Code Original\UnrealEngine-4.4\Projects\Claudia\Claudia.uproject"" exited with code -1. C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V120\Microsoft.MakeFile.Targets 38 5 Claudia
4 IntelliSense: declaration is incompatible with "FLogCategoryLogLockFreeList LogLockFreeList" (declared at line 6 of "E:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\Core\Public\Containers\LockFreeList.h") e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\Core\Public\Containers\LockFreeList.h 6 10 Claudia
5 IntelliSense: declaration is incompatible with "FLogCategoryLogObj LogObj" (declared at line 10 of "E:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\CoreUObject\Public\UObject\UObject.h") e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\CoreUObject\Public\UObject\UObject.h 10 1 Claudia
6 IntelliSense: declaration is incompatible with "FLogCategoryLogUObjectGlobals LogUObjectGlobals" (declared at line 12 of "E:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\CoreUObject\Public\UObject\UObjectGlobals.h") e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\CoreUObject\Public\UObject\UObjectGlobals.h 12 17 Claudia
7 IntelliSense: identifier "FOnSelectedLevelsChangedEvent" is undefined e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\Engine\Classes\Engine\World.h 1929 2 Claudia
8 IntelliSense: declaration is incompatible with "FLogCategoryLogActor LogActor" (declared at line 35 of "E:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\Engine\Classes\GameFramework/Actor.h") e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\Engine\Classes\GameFramework\Actor.h 35 12 Claudia
9 IntelliSense: identifier "bHiddenEd" is undefined e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\Engine\Classes\GameFramework\Actor.h 1216 10 Claudia
10 IntelliSense: identifier "bHiddenEdTemporary" is undefined e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\Engine\Classes\GameFramework\Actor.h 1232 52 Claudia
11 IntelliSense: identifier "UParticleModuleEventSendToGame" is undefined e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\Engine\Classes\Particles\ParticleSystemComponent.h 886 68 Claudia
12 IntelliSense: identifier "UParticleModuleEventSendToGame" is undefined e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\Engine\Classes\Particles\ParticleSystemComponent.h 899 68 Claudia
13 IntelliSense: identifier "UParticleModuleEventSendToGame" is undefined e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\Engine\Classes\Particles\ParticleSystemComponent.h 917 69 Claudia
14 IntelliSense: identifier "UParticleModuleEventSendToGame" is undefined e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\Engine\Classes\Particles\ParticleSystemComponent.h 929 42 Claudia
15 IntelliSense: no instance of constructor "FReadSurfaceDataFlags::FReadSurfaceDataFlags" matches the argument list e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\Engine\Public\UnrealClient.h 55 92 Claudia
16 IntelliSense: no instance of constructor "FReadSurfaceDataFlags::FReadSurfaceDataFlags" matches the argument list e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\Engine\Public\UnrealClient.h 63 87 Claudia
17 IntelliSense: identifier "FMeshBatchElement" is undefined e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Engine\Source\Runtime\ShaderCore\Public\VertexFactory.h 488 131 Claudia
18 IntelliSense: no instance of overloaded function "APickup::APickup" matches the specified type e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Projects\Claudia\Source\Claudia\Private\Pickup.cpp 7 10 Claudia
19 IntelliSense: expected a '{' e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Projects\Claudia\Source\Claudia\Private\Pickup.cpp 8 2 Claudia
20 IntelliSense: cannot open source file "Pickup.generated.h" e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Projects\Claudia\Source\Claudia\Public\Pickup.h 4 1 Claudia
21 IntelliSense: expected an identifier e:\Unreal Engine Source Code Original\UnrealEngine-4.4\Projects\Claudia\Source\Claudia\Public\Pickup.h 12 2 Claudia
I cannot find ANYTHING ANYWHERE on the issue 
Oh, except one fix which is to use the launcher to make the engine. But I have to build it via the github source code. It’s for a uni assessment.