State design pattern - can't find an error

[ZeroesAndOnes]

Hello guys, I am trying to implement a State Design pattern, but I am stuck with it since I can't get my code compiled, and can't find solution to it

Error happens in this part of the code, while trying to call method setState

void StartTransmitted::nextState(I2CStateContext* currentContext)
{
    cout << "Start Transmitted is running .." << endl;
    this->sendSignal();
    // this is where error occours
    currentContext->setState(new AdrWTransACKRec());
}

StartTransmitted.h

#pragma once
#ifndef _START_TRANSMITTED_H_
#define _START_TRANSMITTED_H_

#include "I2CState.h"

class StartTransmitted : public I2CState
{
    public:
        void nextState(I2CStateContext* currentContext);

    private:
        void sendSignal(void);
};

#endif

StartTransmitted.cpp

#include "StartTransmitted.h"
#include "AdrWTransACKRec.h"


void StartTransmitted::nextState(I2CStateContext* currentContext)
{
    cout << "Start Transmitted is running .." << endl;
    this->sendSignal();
    // This is line where error happens
    currentContext->setState(new AdrWTransACKRec());

}

void StartTransmitted::sendSignal(void)
{
    cout << "Sending start signal" << endl;
}

I2CState.h

#pragma once
#ifndef _I2C_STATE_H_
#define _I2C_STATE_H_

#include <iostream>

class I2CStateContext;

using namespace std;

class I2CState
{
    public:
        virtual void nextState(I2CStateContext* currentContext);

    public:
        virtual void sendSignal(void);
        
};

#endif

I2CStateContext.h

#include "I2CStateContext.h"

I2CStateContext::I2CStateContext()
{
    //this->currentState = new State();
}

void I2CStateContext::setState(I2CState* newState)
{
    this->currentState = newState;
}

void I2CStateContext::nextState()
{
    currentState->nextState(this);
}

I2CStateContext.cpp

#pragma once
#ifndef _I2C_CONTEXT_H_
#define _I2C_CONTEXT_H_

#include "I2CState.h"

class I2CStateContext
{
    private:
        I2CState* currentState;
    
    public:
        I2CStateContext();
        void setState(I2CState* newState);
        void nextState();

};

#endif