C++ Interface Implementation compile issue

EDIT: I FIXED THE ISSUE, THE CODE IMPLEMENTATION BELOW WORKS FINE.

Hi there,
I can’t manage to compile c++ class with interface implemented in it.

PlayerController_Interface.h

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once
#include "PlayerController_Interface.generated.h"


/**
*
*/
UINTERFACE(Blueprintable, MinimalAPI)

class UPlayerController_Interface : public UInterface
{
	GENERATED_UINTERFACE_BODY()
};

class IPlayerController_Interface
{
	GENERATED_IINTERFACE_BODY()

public:

	UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = "Fancy")
		FString FancyFunction() const;
};

PlayerController_Interface.cpp

// Fill out your copyright notice in the Description page of Project Settings.

#include "ProjectSpace.h"
#include "PlayerController_Interface.h"


UPlayerController_Interface::UPlayerController_Interface(const FObjectInitializer& ObjectInitializer)
	: Super(ObjectInitializer)
{
}

And here i implement interface to player controller

PlayerControllerBase.h

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "GameFramework/PlayerController.h"
#include "PlayerController_Interface.h"
#include "PlayerControllerBase.generated.h"

/**
 * 
 */
UCLASS()

class PROJECTSPACE_API APlayerControllerBase : public APlayerController , public IPlayerController_Interface
{
	GENERATED_BODY()

public:

	virtual FString FancyFunction_Implementation() const override;

};

PlayerControllerBase.cpp

// Fill out your copyright notice in the Description page of Project Settings.

#include "ProjectSpace.h"
#include "PlayerControllerBase.h"

FString APlayerControllerBase::FancyFunction_Implementation() const
{
	return "Hello";
}

It was syntax error.