Error

10-18 16:30:36.502 4333-4333/com.nokl.androidclient E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.nokl.androidclient, PID: 4333
java.lang.NullPointerException: Attempt to invoke virtual method 'void com.nokl.androidclient.credential.login.LPresenter.ok()' on a null object reference
  at com.nokl.androidclient.credential.login.LoginFragment.onCreateView(LoginFragment.java:104)
  at android.support.v4.app.Fragment.performCreateView(Fragment.java:2192)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1299)
  at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1528)
  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1595)

HelloView.java

import com.arellomobile.mvp.MvpView;

/**
 * Created by ultra on 18.10.2017.
 */
public interface HelloView extends MvpView {

    void setok(boolean ok);
}

LoginFragment.java

public class LoginFragment extends MvpAppCompatFragment implements HelloView {
  @InjectPresenter
    LPresenter mPresenter;
  boolean ok = false;
  @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.login, container, false);
        mPresenter.ok(); //Здесь ошибка
      .........................
    }
  
  @Override
    public void setok(boolean ok) {
      this.ok = ok;
    }
}

Lpresenter.java

import com.arellomobile.mvp.InjectViewState;
import com.arellomobile.mvp.MvpPresenter;

/**
 * Created by ultra on 18.10.2017.
 */
@InjectViewState
public class LPresenter extends MvpPresenter<HelloView> {
    public LPresenter() {
        getViewState().setok(true);
    }
    boolean ok = false;
    void ok() {
        ok = true;
    }
}