app:compileDebugJavaWithJavac

Olá pessoal

Preciso de um help, estou recebendo essa mensagem abaixo. Antes recebia error tunning app, fiz a busca pela lupa e consegui configurar um emulador, mas agora esse outro problema, porem ajudar favor

failed
:app:compileDebugJavaWithJavac
FirstFragment.java
package alura.com.agenda_alura.databinding does not exist
cannot find symbol class FragmentFirstBinding
cannot find symbol variable FragmentFirstBinding
package R does not exist
Main.java
cannot find symbol class Activity
SecondFragment.java
package alura.com.agenda_alura.databinding does not exist
cannot find symbol class FragmentSecondBinding
cannot find symbol variable FragmentSecondBinding
package R does not exist



package alura.com.agenda_alura;

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.navigation.fragment.NavHostFragment;

import alura.com.agenda_alura.databinding.FragmentFirstBinding;

public class FirstFragment extends Fragment {

    private FragmentFirstBinding binding;

    @Override
    public View onCreateView(
            LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState
    ) {

        binding = FragmentFirstBinding.inflate(inflater, container, false);
        return binding.getRoot();

    }

    public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        binding.buttonFirst.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                NavHostFragment.findNavController(FirstFragment.this)
                        .navigate(R.id.action_FirstFragment_to_SecondFragment);
            }
        });
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        binding = null;
    }

}